Rooted SGH i777 Won't Boot After Factory Reset - AT&T Samsung Galaxy S II SGH-I777

Rooted SGH i777 Won't Boot After Factory Reset - AT&T Samsung Galaxy S II SGH-I777

I decided to do a factory reset on my rooted SGH i777. When I did the factory reset, the phone was plugged into my computer. Now when I turn on the phone I see the Samsung Galaxy logo and then the screen goes black (no backlight) and the phone is completely unresponsive. Is there any hope to save my phone?

US variants have their own specific fora, your thread belongs here. I've asked mods to move it for you, sit tight until they do. Generally speaking (and this is the only advice I'm prepared to give you as I don't have your specific device, but the advice holds true for all Samsung phones), if you don't have download or recovery modes, you're probably boned.
I'm sure other people will suggest a few 'longshot' things you can try which might have a very very rough chance of working when your thread gets moved to the right place though.

I'd say there is a fairly good chance...
Can you boot into download mode? If so, then it's very likely. Just flash the stock firmware with Odin. You can download the necessary firmware file from the Download Repository. If you need any additional help, just ask.

creepyncrawly said:
I'd say there is a fairly good chance...
Can you boot into download mode? If so, then it's very likely. Just flash the stock firmware with Odin. You can download the necessary firmware file from the Download Repository. If you need any additional help, just ask.
Click to expand...
Click to collapse
I can't boot into recovery or download mode.

dave455 said:
I can't boot into recovery or download mode.
Click to expand...
Click to collapse
Are you using the right button combo? Power+both volume keys.

dave455 said:
I can't boot into recovery or download mode.
Click to expand...
Click to collapse
Generally, a hard bricked phone is one that exhibits no signs of life. If there are any signs of life, buttons light up, boot screen appears, screen flickers, etc, then it is not hard bricked, and is probably recoverable. But first, you need to get it into download mode.
If the phone is hard bricked, you can get it back with jtag repair from a reputable shop such as Mobile Tech Videos.
There are several ways to put the phone into download mode. You should try all of them that you can before you give up.
Recovery mode:
With the phone off (and not connected to the computer), and battery installed, hold all three buttons, vol- vol+ pwr continuously until the initial boot screen appears the second time.
Download mode:
1. With the phone off and connected to the computer via USB cable, and battery installed, hold all three buttons, vol- vol+ pwr.
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
3. With the phone off and battery installed, hold vol- (but not vol+ or pwr) while plugging in the USB cable.
4. Attempt each of the above three options with the battery removed from the phone. The computer will supply the power to the phone.
5. Use Android Debug Bridge (adb) which will only work if USB debugging has been already turned on in Developer Options, since you can't boot into the system to turn it on. With the battery installed and the phone connected to the pc via USB cable, use the command "adb reboot download".
6. Use a USB jig. With the battery installed insert the USB jig into the USB connector of the phone. Some have reported that this method works when no other method would work.

Thanks for that fantastic explanation!
This worked for me:
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
Now, how do I fix my phone with download mode?
Do I need to put a factory firmware image back onto the phone? It currently has rooted firmware that was working perfectly fine until I did a factory reset.

I would suggest that you flash the latest stock firmware, I777UCMD8 (Android 4.1.2 Jelly Bean) which you can download from the Download Repository. After flashing that you can root using the Framaroot application using the Aragorn exploit.
If you want custom firmware, once rooted you can install either Mobile Odin lite or Mobile Odin Pro and flash a custom kernel which has ClockworkMod Recovery. Following that, you can flash any firmware of your choice.
To get you started, and in case you need them, here are the directions for using Odin to flash the stock firmware (copy and paste):
How to use stand-alone Odin3 to flash firmware:
Follow and recheck each of the following steps. Do them in order listed, as some steps are dependent on previous steps. Instructions are for Odin3 v1.85 (recommended). It should work with any version of Odin, but some details, like color of items, may be different.
1.) Open Odin on the Windows Desktop.
2.) Have the USB cable plugged into USB port on the computer, but *Not* plugged in to the phone.
3.) Shut the phone off.
4.) While holding down the vol+ & vol- keys, plug micro-usb plug into phone.
5.) In Odin, you should get the yellow box under where it says ID:COM with the text 0:[COMx], and in the Message area, <ID:0/00x> Added!! where x is some number, usually 1-8.
6.) In Odin, make sure Auto Reboot and F. Reset Time are checked and all other items are not checked.
7.) Click on the PDA button. Browse to the tar file you want to install and select it so its path appears in the text edit box next to the button.
8.) Make sure the check box next to the PDA button is checked.
9.) Click the Start button.
10.) You should see the green progress bar advancing.
11.) Once the flash is complete, the phone will reboot into system.

Thanks!
With your help, I was able to recover my phone. Thank you! I will be using stock firmware. Last time I had my phone rooted, it was so slow it was unusable.

Related

[Q] Help My phone is in a Boot loop and I cannot access Download mode!

I totally messed up while trying to install the Simple Honey ROM. I was trying out an ICS rom for a lil while then decided to go back to GB....I ODIN'd back to Eclair, then flashed this rom without flashing GB Bootloader. Now, i am stuck in a bootloop and i cannot get into download mode!!! There are times where I almost get into download mode but a rainbow appears and then it goes into Kernel panic upload mode. The only thing I have not tried yet is using a USB Jig because I have just bought one and it is shipping in the mail. Is there any other way to get it into to download mode? I cannot post in the dev forum because I don't have enough post. Please someone assist me in fixing this issue.
I have tried the following.
1. Install Samsung USB Drivers.
2. Power off the Phone.
3. Pull the Battery.
4. Plug USB cable into Phone.
5. Plug USB cable into PC.
6. Press and Hold: Volume UP + Volume DOWN + Power, all at the same time.
7. Re-insert the battery.
8. The phone will power now, when the screen starts a cycle of going to a BLACK screen, release ONLY the POWER button.
Tried the following with odin:
As for download mode;
1. pull the battery,
2. put it back in;
3. then, with the phone still off, plug your usb into the computer,
4. turn on odin3,
5. hold the center of the volume buttons,
6. plug the usb to the phone while holding the volume botton
tried holding both volumes without a battery then put the battery in and while still holding plug into usb to see if odin showed a yellow com button. Rainbow occurred and kernel panic upload mode appears.
If odin does detect my phone, the longest it will detect my phone for is around 30 seconds then it will either reboot or go into kernel panic upload mode.
cannot try this posted by Raymond PJR post #9492 p950 on the simple honey thread because I cannot get it into download mode
The bootlooping probably has nothing to do with the GB Bootloaders, but is a known issue that is resolved by immediately flahsing Bullet then back to Talon if you want. So, get the Bullet .tar, start Odin on your PC, get into download mode, connect to your pc and flash Bullet. Then if you want to be able to see what is going on in recovery, consider flahsing the GB Bootloaders. Some say they can still make out the menus under the rainbows, but I don't know. I just went ahead and flashed them. READ, READ, READ, every OP before flahsing, (GB Bootloaders OP, Bullet OP, and if you've never used Odin, the OP of any thread you read on instructions. And watch any related videos on YouTube!
Bootloaders: http://forum.xda-developers.com/show....php?t=1117990
Bullet Kernels: http://rootzwiki.com/topic/639-kerne...es-edt6242011/
also tried this because I could not get download mode or recovery mode. So I tried this trick through odin but it still did not get it into recovery mode after this.
http://forum.xda-developers.com/showpost.php?p=9663212&postcount=53
Rom used:
http://forum.xda-developers.com/showthread.php?t=1021383&page=950
USB Jig for people who may have a similar problem:
http://usbjig.com/
Version of Odin used:
1.85
Please any suggestions would be helpful thank you!

Wait for the jig it will save your life
Sent from my SGH-T959 using xda premium

is there any other way that it can be saved without a jig though?

recovery

i have tried holding down the volume rocker and power, as well as the up and power, and down and power, but it just keeps on starting up. is there any other way to get into recovery mode?

What phone do you have?
On AT&T SGSII SGH-I777 the correct button combination is vol+ vol- and Pwr.
Hold down all three buttons until the boot screen appears, goes black, and appears a second time. (In case it doesn't boot into recovery on the first screen.)

sniper8752 said:
i have tried holding down the volume rocker and power, as well as the up and power, and down and power, but it just keeps on starting up. is there any other way to get into recovery mode?
Click to expand...
Click to collapse
Impossible to offer any reliable assistance without knowing things like whether or not you're rooted, if rooted which ROM/kernel you're using, etc.

it continues to boot. could something be corrupt? is there another way to get around this?
i have gt-i9100 installed. it was i777 before.

sniper8752 said:
it continues to boot. could something be corrupt? is there another way to get around this?
i have gt-i9100 installed. it was i777 before.
Click to expand...
Click to collapse
If you flashed firmware for the I9100 by mistake, and the firmware contained the secondary bootloader, then the button configuration would be different than the I777. Is that what happened?
If so, then you should flash the full stock UCKH7 firmware which includes bootloaders which you can get from the Download Repository. See the link in my signature.

This is what i believe is happening. i don't believe that my phone is rooted though. i don't see any superuser apps.

If you flashed an I9100 firmware by mistake using Odin, you would almost certainly not be rooted.
Anyway, if that is what has happened to your phone, then you need to use Odin to flash back to fully stock UCKH7 Gingerbread using the full firmware flash that contains secondary bootloader and param.lfs files. You can find that in the Download Repository. If you need more assistance, just ask.

so i use this site: http://forum.xda-developers.com/showpost.php?p=20229527&postcount=46 ? if so, which one do i use?
and thanks so much for your help! i appreciate it.

Flash the firmware under the heading I777UCKH7-CL503881 Stock Binaries. You can use either the one-click downloader or the tar.md5 file. The one click downloader is easier.

i noticed there is only a .exe. i ran this, and clicked on start, and it just said this:
<OSM> All threads completed. (succeed 0 / failed 0)
My phone is plugged in and on.

Open the exe file on your desktop. Then put the phone into download mode by:
with the phone off, hold down vol+ and vol- while plugging in the usb cable. Odin should recognize your phone. Then press start.

i don't think that three-button combo worked for me. it turns on the sg2 logo, then black screen, then the logo again, and then boots up normally.

It's not 3 buttons. vol+ and vol- but not power.
Here are the complete flashing instructions. Follow them step by step, and in order. This is for stand-alone odin, but applies to the one-click version as well, except you can ignore the steps about choosing the file, what to check, etc.
______________________________________________________________
How to use stand-alone Odin3 to flash firmware:
Follow and recheck each of the following steps. Do them in order listed, as some steps are dependent on previous steps. Instructions are for Odin3 v1.85. It should work with any version of Odin, but some details, like color of items, may be different. (Skip steps 6 to 8 with one-click downloader.
1.) Open Odin on the Windows Desktop.
2.) Have the USB cable plugged into USB port on the computer, but *Not* plugged in to the phone.
3.) Shut the phone off.
4.) While holding down the vol+ & vol- keys, plug micro-usb plug into phone.
5.) In Odin, you should get the yellow box under where it says ID:COM with the text 0:[COMx], and in the Message area, <ID:0/00x> Added!! where x is some number, usually 1-8.
6.) In Odin, make sure Auto Reboot and F. Reset Time are checked and all other items are not checked.
7.) Click on the PDA button. Browse to the tar file you want to install and select it so its path appears in the text edit box next to the button.
8.) Make sure the check box next to the PDA button is checked.
9.) Click the Start button.
10.) You should see the green progress bar advancing.
Let me know if it flashes successfully.

not getting the yellow bar. it just shows the charging sign on my phone. :/

Yes of course. I'm moving too fast and not thinking.
You flashed I9100 secondary bootloader. Your recovery button combination is changed. Your download mode button combination is also changed.
OK. You can get a usb jig to put your phone into download mode. If you don't have one, you can buy one on the net.
Or... you can also boot into download mode using "adb reboot download". I havn't used this method to start an Odin flash, but I presume you would use adb to put the phone into download mode, unplug the usb cable, close the command prompt, open Odin and plug the usb cable back into the phone.
If you are unfamiliar with adb, here is a pretty good place to start learning about it.

hm, could i do this?:
BUT WHAT IF I’M/YOU’RE TRYING TO GET TO CLOCKWORKMOD RECOVERY?
1 ) Before the above you should have downloaded ROM Manager from the Android Market and Flashed ClcockworkMod REcovery. When it ask you what version you should select “Samsung T-Mobile GalaxyS2.” I know it says T-Mobile but select it anyways.
2 ) From Rom Manager you can select Reboot into Recovery OR you can turn your phone off and follow my previous top instructions.
http://forum.xda-developers.com/showthread.php?t=1409769

No. Never use rom manager on the I777.
Edit: That link is from I727 Skyrocket forums. I sure hope your phone is I777 not I727. That's what you said earlier.
Another way to try to get into download mode:
Remove the battery. Hold down one or both of the volume buttons and plug in the usb cable. The usb connection will supply the power. Try that while you have odin open on the pc, and see if it gets you into download mode.

it worked!!!!
where is the tar file?

i just didn't apply any file for 1.81. what does it do, by the way, with no file selected?

If you used the one-click downloader, the firmware and Odin are both contained in the exe file, so you don't have to add anything. If you pressed start, and Odin reported success, then you flashed the firmware.

[Q] Soft bricked i777

Hey guys, I really need help with my situation. I've been looking all over the forums for 2days straight trying to find solutions to my problem. I have a galaxy s2 i777 and I had the sho-stock3 rom. Then I decided that I wanted to back up my rom, so I used rom manager to do it. that's when the problem started. when the phone tried restarting it was stuck where it says "galaxy s2" with the yellow triangle. I put it into download mode and tried to flash siyah kernel..it worked..but when I tried to reboot my phones says "firmware upgrade encountered an issue, please select recovery mode in kies and try again. of course kies wont let the phone connect. and yes all the drives are installed for my phone. now i'm just stuck trying to flash stock firmwares for the phone and the stock rom but it always fails in odin. please help me!!!!!

Hours76 said:
Hey guys, I really need help with my situation. I've been looking all over the forums for 2days straight trying to find solutions to my problem. I have a galaxy s2 i777 and I had the sho-stock3 rom. Then I decided that I wanted to back up my rom, so I used rom manager to do it. that's when the problem started. when the phone tried restarting it was stuck where it says "galaxy s2" with the yellow triangle. I put it into download mode and tried to flash siyah kernel..it worked..but when I tried to reboot my phones says "firmware upgrade encountered an issue, please select recovery mode in kies and try again. of course kies wont let the phone connect. and yes all the drives are installed for my phone. now i'm just stuck trying to flash stock firmwares for the phone and the stock rom but it always fails in odin. please help me!!!!!
Click to expand...
Click to collapse
Don't use rom manager again
Sent from my SGH-I777 using Tapatalk 4 Beta

Can you get in either cwm recovery or download mode?
Sent from my SGH-I777 using xda app-developers app

Teknodad1974 said:
Can you get in either cwm recovery or download mode?
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
yes i can get into download mode only by holding down on vol and plugging in the usb...no i cant get into cwm recovery

Try this page...
http://forum.xda-developers.com/showthread.php?t=1511906
Sent from my SGH-I777 using xda app-developers app

Teknodad1974 said:
Try this page...
http://forum.xda-developers.com/showthread.php?t=1511906
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
thank you, my phone is back again!!

Sweet enjoy your phone buddy!
Sent from my SGH-I777 using xda app-developers app

Hours76 said:
yes i can get into download mode only by holding down on vol and plugging in the usb...no i cant get into cwm recovery
Click to expand...
Click to collapse
this SAVED me...I couldn't get it into download mode for the life of me and that worked. I now have the correct i777 JB file (I accidentally flashed the wrong version). back in the game!

Help
sbello81 said:
this SAVED me...I couldn't get it into download mode for the life of me and that worked. I now have the correct i777 JB file (I accidentally flashed the wrong version). back in the game!
Click to expand...
Click to collapse
Hello
My friend just gave me I777 with this problem cause he bought a new phone, he couldn't tell me exactly when he got that "connect to kies". I never flashed anything or installed any rom's, I just want to get it back to life. Any solutions for me?

Fratula said:
Hello
My friend just gave me I777 with this problem cause he bought a new phone, he couldn't tell me exactly when he got that "connect to kies". I never flashed anything or installed any rom's, I just want to get it back to life. Any solutions for me?
Click to expand...
Click to collapse
Can you put the phone into download mode? I would assume the answer is yes if you still get the "connect to kies" message. Following are detailed instructions for getting into download mode.
Download Mode:
There are several ways to put the phone into download mode. You should try all of them that you can before you give up.
Recovery mode:
With the phone off (and not connected to the computer), and battery installed, hold all three buttons, vol- vol+ pwr continuously until the initial boot screen appears the second time.
Download mode:
1. With the phone off and connected to the computer via USB cable, and battery installed, hold all three buttons, vol- vol+ pwr.
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
3. With the phone off and battery installed, hold vol- (but not vol+ or pwr) while plugging in the USB cable.
4. Attempt each of the above three options with the battery removed from the phone. The computer will supply the power to the phone.
5. Use Android Debug Bridge (adb) which will only work if USB debugging has been already turned on in Developer Options, since you can't boot into the system to turn it on. With the battery installed and the phone connected to the pc via USB cable, use the command "adb reboot download".
6. Use a USB jig. With the battery installed insert the USB jig into the USB connector of the phone. Some have reported that this method works when no other method would work.
If the phone will go into download mode, you will need to use Odin desktop to flash the stock firmware. You should use the latest stock firmware. Go to the Download Repository and download Odin3 v1.85 from the link near the top of the page, and also download the latest stock firmware, "I777UCMD8 Stock Binaries (Android 4.1.2 Jelly Bean)" from near the bottom of the page. It's the next to last item. Download both to your Windows pc, and then follow the detailed instructions below to flash it onto your phone.
How to use stand-alone Odin3 to flash firmware:
Follow and recheck each of the following steps. Do them in order listed, as some steps are dependent on previous steps. Instructions are for Odin3 v1.85. It should work with any version of Odin, but some details, like color of items, may be different.
1.) Open Odin on the Windows Desktop.
2.) Have the USB cable plugged into USB port on the computer, but *Not* plugged in to the phone.
3.) Shut the phone off.
4.) While holding down the vol+ & vol- keys, plug micro-usb plug into phone.
5.) In Odin, you should get the yellow box under where it says ID:COM with the text 0:[COMx], and in the Message area, <ID:0/00x> Added!! where x is some number, usually 1-8.
6.) In Odin, make sure Auto Reboot and F. Reset Time are checked and all other items are not checked.
7.) Click on the PDA button. Browse to the tar file you want to install and select it so its path appears in the text edit box next to the button.
8.) Make sure the check box next to the PDA button is checked.
9.) Click the Start button.
10.) You should see the green progress bar advancing.
11.) When complete, you will get a PASS (or FAIL if unsuccessful).
The phone should boot up normally. If it does not, enter recovery (see instructions in the download mode section) and perform a wipe data/factory reset.

[Q] Stuck on Samsung screen

Samsung Galaxy S 2 AT&T
Jellybean
Rooted about 3-4 months ago
The phone was fully charged and on the arm of the chair in my peripheral vision. I saw the Samsung logo come on and since then nothing has changed. I can't go into any mode (vol+, vol-, pwr). Cable connection to the computer shows no response that anything is connected to the computer. I took it to AT&T and they said there were issues with the last update that caused irreparable issues. (Of course they want to sell me the latest and greatest) I got a new S 5 but I would like to pass the S 2 to my daughter. I didn't lose any apps, pics or data. I just want it back to stock + rooted.
Any help would be greatly appreciated!

Just to be sure, are you holding vol +, vol -, pwr until you see the samsung logo the SECOND time?
It isn't always necessary to wait the second cycle, but it ensures that the key command is correctly registered by the phone.
dbur0727 said:
Samsung Galaxy S 2 AT&T
Jellybean
Rooted about 3-4 months ago
The phone was fully charged and on the arm of the chair in my peripheral vision. I saw the Samsung logo come on and since then nothing has changed. I can't go into any mode (vol+, vol-, pwr). Cable connection to the computer shows no response that anything is connected to the computer. I took it to AT&T and they said there were issues with the last update that caused irreparable issues. (Of course they want to sell me the latest and greatest) I got a new S 5 but I would like to pass the S 2 to my daughter. I didn't lose any apps, pics or data. I just want it back to stock + rooted.
Any help would be greatly appreciated!
Click to expand...
Click to collapse

cyril279 said:
Just to be sure, are you holding vol +, vol -, pwr until you see the samsung logo the SECOND time?
It isn't always necessary to wait the second cycle, but it ensures that the key command is correctly registered by the phone.
Click to expand...
Click to collapse
I tried again making sure to release all buttons when I saw the logo the second time. I also tried again releasing the pwr button only. Nothing is working.

You need to see if the phone will go into download mode. There are several ways to put the phone into download mode. You should try all of them that you can before you give up.
Download mode:
1. With the phone off and connected to the computer via USB cable, and battery installed, hold all three buttons, vol- vol+ pwr.
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
3. With the phone off and battery installed, hold vol- (but not vol+ or pwr) while plugging in the USB cable.
4. Attempt each of the above three options with the battery removed from the phone. The computer will supply the power to the phone.
5. Use Android Debug Bridge (adb) which will only work if USB debugging has been already turned on in Developer Options, since you can't boot into the system to turn it on. With the battery installed and the phone connected to the pc via USB cable, use the command "adb reboot download".
6. Use a USB jig. With the battery installed insert the USB jig into the USB connector of the phone. Some have reported that this method works when no other method would work.

creepyncrawly said:
You need to see if the phone will go into download mode. There are several ways to put the phone into download mode. You should try all of them that you can before you give up.
Download mode:
1. With the phone off and connected to the computer via USB cable, and battery installed, hold all three buttons, vol- vol+ pwr.
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
3. With the phone off and battery installed, hold vol- (but not vol+ or pwr) while plugging in the USB cable.
4. Attempt each of the above three options with the battery removed from the phone. The computer will supply the power to the phone.
5. Use Android Debug Bridge (adb) which will only work if USB debugging has been already turned on in Developer Options, since you can't boot into the system to turn it on. With the battery installed and the phone connected to the pc via USB cable, use the command "adb reboot download".
6. Use a USB jig. With the battery installed insert the USB jig into the USB connector of the phone. Some have reported that this method works when no other method would work.
Click to expand...
Click to collapse
Okay. I was successful using option 1. However, I installed the SIM card (for my daughter's phone) and it has been stuck on "Downloading..." for around 6 hours or so. Should I have downloaded a stock OS or something? Is it waiting for me? Is it pulling the factory default OS OTA?

dbur0727 said:
Okay. I was successful using option 1. However, I installed the SIM card (for my daughter's phone) and it has been stuck on "Downloading..." for around 6 hours or so. Should I have downloaded a stock OS or something? Is it waiting for me? Is it pulling the factory default OS OTA?
Click to expand...
Click to collapse
Sorry I didn't include more information in my previous post. Putting the phone into download mode just lets us know that the phone can be recovered, but it doesn't do anything by itself. The process of recovery is to use the Odin program to install a fresh stock firmware onto the phone. Since you appearantly are unfamiliar with the process, I will explain in detail.
First, download the stock 4.1.2 Jellybean Full distribution, I777UCMD8 from the Download Repository. (link in my signature) It's the next to last item near the bottom. The downloaded file is in seven-zip (.7z) format and you need to extract the contents using an archiving program. The resulting file, which will have a ...tar.md5 extension, is the file you will use in step 7 below. Also download Odin3 v1.85. There is a link near the top of the page in the Repository.
How to use stand-alone Odin3 to flash firmware:
Follow and recheck each of the following steps. Do them in order listed, as some steps are dependent on previous steps. Instructions are for Odin3 v1.85. It should work with any version of Odin, but some details, like color of items, may be different.
1.) Open Odin on the Windows Desktop.
2.) Have the USB cable plugged into USB port on the computer, but *Not* plugged in to the phone.
3.) Shut the phone off.
4.) While holding down the vol+ & vol- keys, plug micro-usb plug into phone.
5.) In Odin, you should get the yellow box under where it says ID:COM with the text 0:[COMx], and in the Message area, <ID:0/00x> Added!! where x is some number, usually 1-8.
6.) In Odin, make sure Auto Reboot and F. Reset Time are checked and all other items are not checked.
7.) Click on the PDA button. Browse to the tar file you want to install and select it so its path appears in the text edit box next to the button.
8.) Make sure the check box next to the PDA button is checked.
9.) Click the Start button.
10.) You should see the green progress bar advancing.
11.) When complete, you will get a PASS (or FAIL if unsuccessful).
Since you are unable to get into recovery mode now, you may have to enter recovery after the firmware flash is successful if it won't boot on the first try. Use the instructions earlier in the thread to enter recovery, and perform a wipe data/factory reset.
Once you have the phone up and running, Framaroot with the Aragorn exploit is the easiest way to root.
If you need further help or instructions, feel free to ask.

Tab S6 stuck in bootloop, can't get to recovery mode

My Tab S6 tried to auto-install an update yesterday (it is rarely connected to Wifi/internet). It then rebooted. Since then, it's been stuck in a boot loop.
It will display the "Samsung Galaxy Tab S6 | Secured By Knox" logo screen for a few seconds, then switch to the blue "Installing System Update" screen (with the android logo). Installing System Update gets to 28% and stops. Then the rotating icon on the android freezes. Then the device reboots and starts all over again.
Edit: the tablet is 100% stock. It's not been rooted or had any custom ROMs loaded.
I have tried getting to recovery mode, by holding power+volup while it boots. This doesn't seem to change the behavior at all. Any advice is much appreciated.

Fedge7 said:
My Tab S6 tried to auto-install an update yesterday (it is rarely connected to Wifi/internet). It then rebooted. Since then, it's been stuck in a boot loop.
It will display the "Samsung Galaxy Tab S6 | Secured By Knox" logo screen for a few seconds, then switch to the blue "Installing System Update" screen (with the android logo). Installing System Update gets to 28% and stops. Then the rotating icon on the android freezes. Then the device reboots and starts all over again.
Edit: the tablet is 100% stock. It's not been rooted or had any custom ROMs loaded.
I have tried getting to recovery mode, by holding power+volup while it boots. This doesn't seem to change the behavior at all. Any advice is much appreciated.
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can you shut it down? try volume down and power button ? if it don't shut down, do this soon as it reboots, hold volume up and down and plug in usb cable to desktop/laptop usb port! it will boot into download mode!

N1NJATH3ORY said:
can you shut it down? try volume down and power button ? if it don't shut down, do this soon as it reboots, hold volume up and down and plug in usb cable to desktop/laptop usb port! it will boot into download mode!
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Click to collapse
I can't actually shut it down. If I start holding power+voldown right after it boots, the tablet does reboot before getting stuck at 28%. But it reboots--it doesn't power off.
I tried download mode and that actually seemed to work! Specifically, I left the tablet overnight in the reboot loop until the battery drained. Just now, I held down volup+voldown and plugged it into my laptop. I got the green "Warning/Custom OS" screen and then pressed volup to continue. The tablet rebooted pretty quickly after that (I'm guessing due to low battery) so I didn't get a good look at the download mode options.
Once I'm in download mode, can I factory reset the tablet? I don't need to preserve any data/apps/settings.

Fedge7 said:
I can't actually shut it down. If I start holding power+voldown right after it boots, the tablet does reboot before getting stuck at 28%. But it reboots--it doesn't power off.
I tried download mode and that actually seemed to work! Specifically, I left the tablet overnight in the reboot loop until the battery drained. Just now, I held down volup+voldown and plugged it into my laptop. I got the green "Warning/Custom OS" screen and then pressed volup to continue. The tablet rebooted pretty quickly after that (I'm guessing due to low battery) so I didn't get a good look at the download mode options.
Once I'm in download mode, can I factory reset the tablet? I don't need to preserve any data/apps/settings.
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Click to collapse
You cannot reset the tablet from Download mode afaik- You need to enter Recovery Mode to do that.
You can however, flash stock from Download mode using Odin (3.13.3 is best). If you're not confident with doing that, your best option is Factory Reset in Recovery Mode. Hold Volume Up and Power when the Tablet is booting, let go when you see the Samsung logo. The timing can be tricky, but you should be able to do it. Also, you can force a reboot with Volume Down and Power.
Alternatively, if factory reset doesn't work, since you're completely stock, you will still be covered under warrenty.

bartleby999 said:
your best option is Factory Reset in Recovery Mode. Hold Volume Up and Power when the Tablet is booting, let go when you see the Samsung logo.
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Thanks for the suggestion. I have tried this many many times. I've tried letting go of the buttons at different times. I've tried holding volup while letting go of power. I've tried this a ton of different ways, and no matter what, the tablet always shows the "Installing system update" screen. Some googling has led me to believe that sometimes, when performing a factory reset, the "Installing system update" screen shows up right before the normal recovery screen. Is it possible that the tablet is trying to get to recovery mode, but can't get past this first step?

Fedge7 said:
Is it possible that the tablet is trying to get to recovery mode, but can't get past this first step?
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Click to collapse
Honestly, I don't know - I'm not an expert but I guess it's possible that the update failed and corrupted both System and Recovery.
You'll be covered under warrenty, so maybe just return the Tablet from where you purchased or direct to Samsung, could take a while given the current situation though I guess. If you have a PC, then I think the best option would be to just flash stock yourself, since that's probably all Samsung will do. Even if that doesn't work you'd still be covered under warrenty, as far as I'm aware attempting to flash stock doesn't trip Knox.

Here is solution to unbrick your device!!!
Fedge7 said:
My Tab S6 tried to auto-install an update yesterday (it is rarely connected to Wifi/internet). It then rebooted. Since then, it's been stuck in a boot loop.
...
Edit: the tablet is 100% stock. It's not been rooted or had any custom ROMs loaded.
I have tried getting to recovery mode, by holding power+volup while it boots. This doesn't seem to change the behavior at all. Any advice is much appreciated.
Click to expand...
Click to collapse
Despair not...I have just come from resolving this exact situation not 30 minutes ago. I'd been trying to flash (using Odin as I decided to stay on Stock and not root this device, for a change) the latest OneUI2.1 releases for my device (SM-T865 - LTE version) and boom in the middle of the Odin update, the flash just failed...I then couldn't reboot and get into neither Recovery, nor Download Mode because it appears my bootloader and recovery both got corrupted.
Here's what you need....
1. Odin app for PC (am on Windows)
2. Your device's Stock firmware (sammobile firmware archive)
3. You will need someone to help you boot the device directly into Download mode (and this is the tricky part because for most of us we are used to get into Bootloader by using the key combination (from Powered Off device) Vol+ and Power On at the same time to get into stock recovery and then scrolling down to option 2 in this menu, "Reboot to Bootloader". Well now you are going to boot directly into Bootloader mode. Here's how you do it...
4. Get your friend to line up the USB-C cable into the port of the device, but DO NOT press it in...yet
5. Press Power off and Vol- buttons at the same time to turn off the device
6. And now you have to to be super fast: if device starts to turn on on its own, YOU press and hold Vol+ and Vol- both at the same time while YOUR FRIEND pushes the USB cable fully into the port - you should now have booted directly into Download mode. (if not repeat this, and remember to be super fast and sync with your friend pushing in the USB cable)...
7. When you get into Download mode, then you are home and dry...
8. Select ONLY the Bootloader file (BL...XX...) in Odin, make sure only "reset time" and "reboot" are ticked, and flash
9. When device reboots, press Vol+ and Power combo to get back into Bootloader mode again...but I think device will reboot into Download mode on its own
10. Now select all the files from your Stock file into the various tabs (BL, CP, CSC, AP...) do not select HOME_CSC as we want to flush this device clean...
11. Flash, and voila...success - you will have lost all your data but rather that than losing the device...
12. Feedback here and let us know if this works? For reference for others in the future...

FYI, I got in this situation, and the previous post did work for me, just takes good timing! Thanks!!!!

Same issue today for me. My tablet showed different screen with green and red text, it allowed me to delete app data, then booted into safe mode, then i had to do factory reset and now i am screwed, as it is refusing to restore any apps and their settings. I will try to flash it back to Android 9, maybe then it will do the restore. I forgot to do any manual backup to SD or so.
Edit: the device upgraded to 10, but reset itself after about 10 minutes of use.
Edit2: i found what caused it. It is caused by Nova Launcher, if i try to set wallpaper.

Just found a news article that there is a RGB/sRGB problem with wallpapers. It might be the problem i had.
I am adding a screenshot of the result.

Yeah, I had that kind of reboot loop from a wallpaper that I downloaded

I can get into download mode. But it kicks me out within a few seconds. Any help please

I have the same problem with a Tab S6 Lite, it is in bootloop and does not let me enter the recovery mode, I can go into download mode and I flashed the latest original firmware Android11, Android10 etc., . I tried them all but always goes in bootloop, and also the bootloop occurs only if I connect the usb cable to the PC, without any sign of life. Do I still have hopes or have I compromised the motherboard?
The reason for all this is because I had followed a guide to give root permissions with magisk, I did everything right, only that the guide was with Android10, while I had Android11 and I was deceived by the fact that in the title of the guide there was written "guide 2021"
, so I did not check the compatibility of operating systems, I was a fool, I know, I hope so much that I did nothing irretrievable, it's my son's tablet!

Genpis said:
I have the same problem with a Tab S6 Lite, it is in bootloop and does not let me enter the recovery mode, I can go into download mode and I flashed the latest original firmware Android11, Android10 etc., . I tried them all but always goes in bootloop, and also the bootloop occurs only if I connect the usb cable to the PC, without any sign of life. Do I still have hopes or have I compromised the motherboard?
The reason for all this is because I had followed a guide to give root permissions with magisk, I did everything right, only that the guide was with Android10, while I had Android11 and I was deceived by the fact that in the title of the guide there was written "guide 2021"
, so I did not check the compatibility of operating systems, I was a fool, I know, I hope so much that I did nothing irretrievable, it's my son's tablet!
Click to expand...
Click to collapse
Did you use HOME CSC or the non HOME CSC when flashing?

Genpis said:
I have the same problem with a Tab S6 Lite, it is in bootloop and does not let me enter the recovery mode, I can go into download mode and I flashed the latest original firmware Android11, Android10 etc., . I tried them all but always goes in bootloop, and also the bootloop occurs only if I connect the usb cable to the PC, without any sign of life. Do I still have hopes or have I compromised the motherboard?
The reason for all this is because I had followed a guide to give root permissions with magisk, I did everything right, only that the guide was with Android10, while I had Android11 and I was deceived by the fact that in the title of the guide there was written "guide 2021"
, so I did not check the compatibility of operating systems, I was a fool, I know, I hope so much that I did nothing irretrievable, it's my son's tablet!
Click to expand...
Click to collapse
Try to install a castom rooted rom which has pre installed also Twrp.
[MAGISK Rom / Firmware base convertor) 420rom-T860/5 - V13.3- CUE1 - ANDROID 10 - OneUI 3.1 - Sec Patch 05/2021 - Released 06/07/2021
WELCOME TO 420 ROM - MAGISK ROM FOR SAMSUNG GALAXY TAB S6 WiFi/4G (T860/5)! 420rom Telegram-Group: Please bear in mind that things will be added as and when my learning and time permits (being a dad with a family and having ADHD myself means...
forum.xda-developers.com
Download the android 11 last rooted rom from there. You install it with odin as as a normal original rom.
Disable in odin auto reboot. After rom install, restart manually and press the correct buttons immediately to boot in Twrp and not to system. Format (not wipe) data from there and reboot to system. If you are lucky it will work..
(I hope you unlocked bootloader before try to root. If you haven't unlocked bootloader this won't work also).

Moe5508 said:
Here is solution to unbrick your device!!!
Despair not...I have just come from resolving this exact situation not 30 minutes ago. I'd been trying to flash (using Odin as I decided to stay on Stock and not root this device, for a change) the latest OneUI2.1 releases for my device (SM-T865 - LTE version) and boom in the middle of the Odin update, the flash just failed...I then couldn't reboot and get into neither Recovery, nor Download Mode because it appears my bootloader and recovery both got corrupted.
Here's what you need....
1. Odin app for PC (am on Windows)
2. Your device's Stock firmware (sammobile firmware archive)
3. You will need someone to help you boot the device directly into Download mode (and this is the tricky part because for most of us we are used to get into Bootloader by using the key combination (from Powered Off device) Vol+ and Power On at the same time to get into stock recovery and then scrolling down to option 2 in this menu, "Reboot to Bootloader". Well now you are going to boot directly into Bootloader mode. Here's how you do it...
4. Get your friend to line up the USB-C cable into the port of the device, but DO NOT press it in...yet
5. Press Power off and Vol- buttons at the same time to turn off the device
6. And now you have to to be super fast: if device starts to turn on on its own, YOU press and hold Vol+ and Vol- both at the same time while YOUR FRIEND pushes the USB cable fully into the port - you should now have booted directly into Download mode. (if not repeat this, and remember to be super fast and sync with your friend pushing in the USB cable)...
7. When you get into Download mode, then you are home and dry...
8. Select ONLY the Bootloader file (BL...XX...) in Odin, make sure only "reset time" and "reboot" are ticked, and flash
9. When device reboots, press Vol+ and Power combo to get back into Bootloader mode again...but I think device will reboot into Download mode on its own
10. Now select all the files from your Stock file into the various tabs (BL, CP, CSC, AP...) do not select HOME_CSC as we want to flush this device clean...
11. Flash, and voila...success - you will have lost all your data but rather that than losing the device...
12. Feedback here and let us know if this works? For reference for others in the future...
Click to expand...
Click to collapse
Why flashing only the bootloader first? At the moment I'm trying to recover my s20 fe from a bootloop without losing my data
sosimple said:
Try to install a castom rooted rom which has pre installed also Twrp.
[MAGISK Rom / Firmware base convertor) 420rom-T860/5 - V13.3- CUE1 - ANDROID 10 - OneUI 3.1 - Sec Patch 05/2021 - Released 06/07/2021
WELCOME TO 420 ROM - MAGISK ROM FOR SAMSUNG GALAXY TAB S6 WiFi/4G (T860/5)! 420rom Telegram-Group: Please bear in mind that things will be added as and when my learning and time permits (being a dad with a family and having ADHD myself means...
forum.xda-developers.com
Download the android 11 last rooted rom from there. You install it with odin as as a normal original rom.
Disable in odin auto reboot. After rom install, restart manually and press the correct buttons immediately to boot in Twrp and not to system. Format (not wipe) data from there and reboot to system. If you are lucky it will work..
(I hope you unlocked bootloader before try to root. If you haven't unlocked bootloader this won't work also).
Click to expand...
Click to collapse
Any tips in recovering my stock s20 fe from a bootloop without losing data? already tried Odin but without success the first try
jointer said:
Same issue today for me. My tablet showed different screen with green and red text, it allowed me to delete app data, then booted into safe mode, then i had to do factory reset and now i am screwed, as it is refusing to restore any apps and their settings. I will try to flash it back to Android 9, maybe then it will do the restore. I forgot to do any manual backup to SD or so.
Edit: the device upgraded to 10, but reset itself after about 10 minutes of use.
Edit2: i found what caused it. It is caused by Nova Launcher, if i try to set wallpaper.
Click to expand...
Click to collapse
did you managed to not lose your data?

jrdef said:
Any tips in recovering my stock s20 fe from a bootloop without losing data? already tried Odin but without success the first try
Click to expand...
Click to collapse
Wiping cache partition in Recovery and reflashing the firmware are basically your only 2 options

jrdef said:
Any tips in recovering my stock s20 fe from a bootloop without losing data? already tried Odin but without success the first try
Click to expand...
Click to collapse
Flash in odin the same rom you had. There are 2 csc files in rom, which you use 1 in odin one. Try use the "home csc". Home csc keep KEEPS your data. If you're lucky it may work. (It would work in keeping your data 100% if your rom was ok. Because it isn't you have some changes to work.).
You must try with same rom or newer.
CSC – If you flash the CSC file, it’ll perform a factory reset of your Galaxy device and wipe all data while installing a new firmware to bring your device to the same state as it was when you purchased it. Go with CSC if you want a clean installation.
HOME_CSC – On the other hand, if you want to keep your Samsung phone’s data and settings even flashing the stock firmware, you can select the HOME_CSC file.

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