Locked Bootloader w/ no OS installed... - Nexus 9 Q&A, Help & Troubleshooting

Hey guys,
I dun goofed...
Don't ask how, but I am currently in a situation of having a locked bootloader and no OS to boot into so I can unlock it again.
The good news is, I have TWRP installed, but I just can't figure out what I need to flash to get the OS back.
Any help?

Should have figured it out earlier but for some reason it didn't cross my mind.
I hadn't been able to flash the stock image, but installing a rom from here via twrp got me back into Android. All is good now.

Are you able to access the hboot menu or bootloader menu

Related

Help Please!! I need to get my phone back to stock!

I have very little experience in this area and dont know what all these terms mean. I followed the noob proof toolkit to root, now I need to get fully back to stock. I relocked the bootloader and i no longer have root. When I try to update my phone to the newest software update, it downloads the update and restarts into the white screen where you navigate with the volume buttons. I would like help getting this phone back to how I got it from T-mobile please. Please be specific as I'm a noob in these matters. Thanks!
shapiro1234567890 said:
I have very little experience in this area and dont know what all these terms mean. I followed the noob proof toolkit to root, now I need to get fully back to stock. I relocked the bootloader and i no longer have root. When I try to update my phone to the newest software update, it downloads the update and restarts into the white screen where you navigate with the volume buttons. I would like help getting this phone back to how I got it from T-mobile please. Please be specific as I'm a noob in these matters. Thanks!
Click to expand...
Click to collapse
Did you install a custom recovery (clockworkmod or TWRP)? What about a custom ROM?
And the screen you're referring to is called the "bootloader" screen just fyi
mcdsmaster8824 said:
Did you install a custom recovery (clockworkmod or TWRP)? What about a custom ROM?
And the screen you're referring to is called the "bootloader" screen just fyi
Click to expand...
Click to collapse
Yup, i installed cwm. and a custom rom. how do i get it 100% back to stock?
First, you'll have to unlock the bootloader so you can flash the stock rom. Google for stock Tmobile HTC ONE rom, it should return the results you need.
AFTER you have flashed the ROM you'll have to flash the stock recovery via fastboot (fastboot flash recovery <name of your recovery>). Again Google for Tmobile stock recovery, you'll find the .img file. If you're unfamiliar with using ADB and Fastboot commands, use youtube, there are plenty of tutorials that show the basics.
After you have done this, just relock the bootloader and you should be back to stock.
You are right
Here's a nice step-by-step guide for T-Mobile stock. --> http://forum.xda-developers.com/showthread.php?t=2357624

[Q] Cannot Unlock Bootloader

Guys I have a S on, relocked bootloader, for my google edition htc one. It was unlocked, and I recieved the ota 4.4.2 and the stock recovery never installed the update. Then i seen some where on here to just relock the phone, and it should install no problem. Well that didnt work, and now I cant unlock the phone or flash a custom recovery to it. Please help guys. I really want to just totally wipe the phone and flash another rom on it to get it unlocke and s off. Any help will be greatly appreciated.

[Q] help wih stock backup pre-root

I've had a lot of trouble upgrading to KitKat. After attempting to flash different image files for stock recovery/boot/system, I found it impossible to completely unroot the phone using the instructions posted because the phone kept re-rooting itself. Finally, I S-offed, wrote superCID, used the Telus RUU, applied the OTA downloaded to the phone, changed the CID back to GLOBA001 (my carrier is WindMobile). And finally! I know I relocked and unlocked the bootloader somewhere in the process, but I can't quite remember when.
Now, before I even think of re-rooting the phone or installing a custom recovery, I'd like to create a backup of the stock boot, recovery, and system. I tried running
Code:
fastboot boot openrecovery-twrp-2.7.1.1-zaracl.img
using the special KitKat TWRP. There's a message about boot.img being downloaded successfully but the phone reboots to a black screen.
I know that TWRP 2.7.1.0 downloaded from their website worked fine on my phone before I ran the RUU . So I'm not sure that the new TWRP is incompatible with my phone.
If I wanted to use adb instead, I'd need to root the phone before being able to pull the stock recovery, boot, and system images using adb shell. If I have to resort to rooting, is there any way to do so without flashing a custom recovery first? If there is, I might be able to unroot the phone afterward and make it stick. (Delete the supersu apk and su binary, right?)
I remember that the first time my phone attempted to download and apply the OTA automatically, my phone wiped itself. It was a lot of hard work to get it back to a usable state, but it was my own fault for not having a proper backup. I'd like to avoid making that mistake again, and have a stock backup handy on my computer in case there are carrier updates for my phone in the future.
To re-iterate, possible to back up stock everything without root? If not, possible to root without installing custom recovery?
You can no longer boot into a custom recovery, you have to actually flash it.
As far as having the stock recovery and boot, those are actually inside the OTA so you can pull it from there.
Since you'll have the stock recovery already, you can flash TWRP and use that to backup boot and system.
When you need to go stock, just use TWRP to restore your backup and then manually flash the stock recovery.
Since you made the device S-OFF, I recommend that if you need to lock/unlock the bootloader that you use the commands in this thread versus using the htcdev method as that wipes the /data/preload/ folder (as part of its normal /data wipe) which includes a few stock apps.
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
Locking the bootloader won't do anything, it's only unlocking using the htcdev token that causes the data wipe. So if you haven't unlocked using the htcdev method since running the RUU you will still have the 2 - 3 apps.
I don't know if the /data/preload/ folder is a requirement for a successful OTA update or not but I checked inside my OTA zip for my phone and it does include the 3 items stored there for the VM variant.
The unlock was AFTER the RUU. I ran the RUU, then used the OTA to upgrade to KitKat, then unlocked the bootloader again. However, I didn't notice any apps disappearing and the OTA zip for Wind also has a /data/preload folder.
*Shrugs* Seems good enough to me. TWRP, here I come!
needing wind stock stuck with wind awsy amd wont connect
I have an unlocked desire 601 it finds only wind away I'm trying to get a backup of the stock Rom to flash it does anyone k ow if there any around or even a back up I can use to try to get my phone working on wind home
jayjsteez said:
I have an unlocked desire 601 it finds only wind away I'm trying to get a backup of the stock Rom to flash it does anyone k ow if there any around or even a back up I can use to try to get my phone working on wind home
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2804427
needing help for s-off
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
hey i have unlocked desire 601 but only says wind away and wont connect ive knoticed the wind version is the same as the other versions but im wondering do i need the wind rom in order for it to pick up the wind home i cant seem to find anywhere online the wind rom and everytime i try to s-off it saysfailed and ive followed everything is there any insite you could give me to help me with this issue if its fixable again my phone says wind away but wont connect to it and i need to get it working as its my only device and carrier i use thx
---------- Post added at 11:29 PM ---------- Previous post was at 11:16 PM ----------
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
hey i have unlocked desire 601 but only says wind away and wont connect ive knoticed the wind version is the same as the other versions but im wondering do i need the wind rom in order for it to pick up the wind home i cant seem to find anywhere online the wind rom and everytime i try to s-off it saysfailed and ive followed everything is there any insite you could give me to help me with this issue if its fixable again my phone says wind away but wont connect to it and i need to get it working as its my only device and carrier i use thx
-Duir- said:
You can no longer boot into a custom recovery, you have to actually flash it.
As far as having the stock recovery and boot, those are actually inside the OTA so you can pull it from there.
Since you'll have the stock recovery already, you can flash TWRP and use that to backup boot and system.
When you need to go stock, just use TWRP to restore your backup and then manually flash the stock recovery.
Since you made the device S-OFF, I recommend that if you need to lock/unlock the bootloader that you use the commands in this thread versus using the htcdev method as that wipes the /data/preload/ folder (as part of its normal /data wipe) which includes a few stock apps.
Click to expand...
Click to collapse
I don't understand how you can pull the stock recovery from the OTA. I thought OTA's are immediately installed, instead of stored untill you want to install it? So, how do you backup the stock recovery?
It is saved until you want to install. When it go finishes Downloading, just choose install later. And you will be able to copy it into other storage devices and extract files and what not. I'm not sure if it stores in internal or external I'm 80% sure external sd if you have one.
Sent from my HTC0P4E1 using XDA Free mobile app

Possibly Bricked My Phone

So today I think I really messed up I will tell you the run down. I first put on twrp and then flashed a custom rom. After that the rom wasn't working properly so I tried to revert back to stock without a backup (I know I am dumb ). After reverting back to stock unsuccessfully I locked the bootloader not knowing that it wouldn't let me launch into the already installed custom software's so now I am stuck in download mode not able to unlock bootloader for some reason and not able to access the rom and the recovery. Any help would be very appreciated. Have I really bricked my phone?
can't you just run an RUU since your bootloader is relocked?

[Q] No OS, locked bootloader, S-off

Hey Everyone! So i will be receiving my M8 i got used in the mail on monday and i'm doing some research because it is softbricked due to no OS being installed. It is (presumably) S-Off with Bootoader locked and "possibly" no custom recovery. What i'm planning to do is once the battery is charged completely.
-Connect it to my PC (windows)
-Power into fastboot
-Run the stock AT&T RUU and get everything running and up to date.
From there i will be unlocking the bootloader, custom recovery, root, and all the good stuff.
I'm just wanting to know from the way more knowledgeable folks then i when it comes to this stuff, is if this is the proper procedure. Is there anything else i should do first or after? Any help will be great! I'll know more tomorrow night on if recovery is installed or not, but i'm going with the opinion that there is no custom recovery, as i feel this would be harder.
any help would be GREATLY appreciated!
I agree with the above described approach. Especially since its not clear what the previous owner did (appears previously bootloader unlocked, s-off, then possibly a botched return to stock attempt?) its good to run the AT&T RUU to return to a full stock "baseline" image to all partitions.
Since you are going to run RUU, it doesn't matter whether custom recovery is currently installed or not. The RUU will install the stock recovery image.
After RUU, unlock the bootloader via HTCDev.com. Then install current version TWRP and flash SuperSU 2.46 to obtain root (older versions SuperSU won't work on Lollipop - common mistake).
redpoint73 said:
I agree with the above described approach. Especially since its not clear what the previous owner did (appears previously bootloader unlocked, s-off, then possibly a botched return to stock attempt?) its good to run the AT&T RUU to return to a full stock "baseline" image to all partitions.
Since you are going to run RUU, it doesn't matter whether custom recovery is currently installed or not. The RUU will install the stock recovery image.
After RUU, unlock the bootloader via HTCDev.com. Then install current version TWRP and flash SuperSU 2.46 to obtain root (older versions SuperSU won't work on Lollipop - common mistake).
Click to expand...
Click to collapse
Thank you so much Redpoint! I only have a small amount of knowledge with this area. I've sideloaded an OS over ADB due to a mistake i made with no OS on an old tablet, but never had to deal with possibly stock recovery with a locked bootloader, so knowing my approach will presumably work is a real relief.
Thank you again!!!:good::fingers-crossed:

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