Phone doesn't recognizedas usb device - Xiaomi Redmi Note 4 Questions & Answers

I unlocked the bootloader and rooted my rexmi note 4. After rooting my pc doesn't recognise it. Tell me the fix please

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ayush.gl said:
I unlocked the bootloader and rooted my rexmi note 4. After rooting my pc doesn't recognise it. Tell me the fix please
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[Q] ><~bootloader fail~

Hello Guys~i really need some help~please~I'm using Sony Ericsson X10~
I do the bootloader unlock sim~all fine...~downgrade...with flash tool~
After that~downgrade success lol~and i open the qsd8250_semc to unlock sim~
The system will just start if you press any key but after i do that~
i forgot to close my flashtool~damm~==~
and i close my qsd8250_semc.cmd 1st then i close flashtool~i think it crash already~
after that the phone automatic start up~i don care about it and i take out the battery and put in again~then start from the step qsd8250_semc.
i open the qsd8250_semc and all success killing...etc~
but when i need to upgrade back the karnel~i got a big problem~
the flash tool say "USB debugging"are off and wan to start up the phone and go to enable it~
but i cannot start my phone~just stack at the loading screen with the word~(Sony Ericsson)~i waiting about 1hours also cannot get in~i tried to wait it~and i try to do the upgrade karnel process again~
the flash tool is run about 80%~i think it success but it say again need to on the "USB debugging"and aborted~
Damm~now when i start up my phone~after the word (Sony Ericsson)come out~and then it will display a green background and got a big (!) symbol~
Someone can help me to fix this problem please~thx alot~Guys~
Some One Please Help~
waikhin520 said:
Some One Please Help~
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Lol. Ok, what you've manage to do was successfully brick you phone. No worries, this is an easy fix.
1. Download a stock 2.3.3 SE ROM.
2. Put .ftf file into the firmware folder of the flashtool (make sure its the latest version flashtool.)
3. Follow the flashtool's instructions.
4. After successfully flashing the stock ROM, Keep the flashtool open. Unplug the device and boot the device. Enable debugging and unknown sources.
5.Plug in phone (phone should still be on), flashtool will recognize the device seconds after. Then root.
6. After successfully rooting the device, repeat unlocking methods.
PS: The wonderful thing about our devices (x10) is that you can never break your phone by flashing too many times or bricking the device. Never. The only absolute way to break your phone is to damage the USB port. So be gentle with that part of the phone.
Mr.Quipster said:
Lol. Ok, what you've manage to do was successfully brick you phone. No worries, this is an easy fix.
1. Download a stock 2.3.3 SE ROM.
2. Put .ftf file into the firmware folder of the flashtool (make sure its the latest version flashtool.)
3. Follow the flashtool's instructions.
4. After successfully flashing the stock ROM, Keep the flashtool open. Unplug the device and boot the device. Enable debugging and unknown sources.
5.Plug in phone (phone should still be on), flashtool will recognize the device seconds after. Then root.
6. After successfully rooting the device, repeat unlocking methods.
PS: The wonderful thing about our devices (x10) is that you can never break your phone by flashing too many times or bricking the device. Never. The only absolute way to break your phone is to damage the USB port. So be gentle with that part of the phone.
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It's not true that you can't brick it. Once you have unlocked the bootloader there's a chance to brick it (One or two devs have done it before).
aR_ChRiS said:
It's not true that you can't brick it. Once you have unlocked the bootloader there's a chance to brick it (One or two devs have done it before).
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If you're talking about "bricking" the device then of course there is always a chance of bricking. Whether it be on a locked or unlocked bootloader. I was talking about permanently breaking the device, meaning it is unable to fix or repair.
Mr.Quipster said:
If you're talking about "bricking" the device then of course there is always a chance of bricking. Whether it be on a locked or unlocked bootloader. I was talking about permanently breaking the device, meaning it is unable to fix or repair.
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You misunderstand
Bricking means to permantly break it.
With a locked bootloader you can not do that because you can always do a software repair with SEUS/PCCompanion.
With an unlocked bootloader you can do that and the only potential way of savng it is with JTAG.
But here is the point, You cannot brick your phone with a locked bootloader!!!
It may lock on you, you may not be able to boot, but thats does not mean its bricked
gregbradley said:
You misunderstand
Bricking means to permantly break it.
With a locked bootloader you can not do that because you can always do a software repair with SEUS/PCCompanion.
With an unlocked bootloader you can do that and the only potential way of savng it is with JTAG.
But here is the point, You cannot brick your phone with a locked bootloader!!!
It may lock on you, you may not be able to boot, but thats does not mean its bricked
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Thank you for clearing that up. Now I know...
Guys Thx alot~can you give me a link of the 2.3.3 SE ROM~
?
waikhin520 said:
Guys Thx alot~can you give me a link of the 2.3.3 SE ROM~
?
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http://forum.xda-developers.com/showthread.php?t=936733
can i ask~download which one~><~me damm foolish~
waikhin520 said:
Guys Thx alot~can you give me a link of the 2.3.3 SE ROM~
?
Click to expand...
Click to collapse
Use PCCompanion to install stock 2.3.3 rom...
Just click on update and/or repair
I noe already~thx~downloading~hope it work~^^~alive~
Thx a lot~Man~^^~Love u guys~

[Q] For Help!!!!!

HELLO ,my english is bad ......
my HTC DNA was Not start, Black screen ,When connected to the computer ,Display QDloader ........
who can help me ? thank you
Atlas.F said:
HELLO ,my english is bad ......
my HTC DNA was Not start, Black screen ,When connected to the computer ,Display QDloader ........
who can help me ? thank you
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Click to collapse
Is the phone like it was when new or have you rooted it and loaded some custom rom? Hard to help without some additional clues.
Atlas.F said:
HELLO ,my english is bad ......
my HTC DNA was Not start, Black screen ,When connected to the computer ,Display QDloader ........
who can help me ? thank you
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Click to collapse
Help me out to better understand the situation I need to know a few things...
1) What have you done to the device (is the bootloader locked or unlocked? has it been rooted? did you flash any files, if so what files? did you attempt s-off?)
2) What were you doing before this happened?
3) Can you access recovery or bootloader?
.torrented said:
Help me out to better understand the situation I need to know a few things...
1) What have you done to the device (is the bootloader locked or unlocked? has it been rooted? did you flash any files, if so what files? did you attempt s-off?)
2) What were you doing before this happened?
3) Can you access recovery or bootloader?
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1,unlocked,
2, I was looking for root s-off .
3, can't into recovery and bootloader......:crying:
Atlas.F said:
1,unlocked,
2, I was looking for root s-off .
3, can't into recovery and bootloader......:crying:
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After you Unlocked it, did you flash anything else?
Can you give me as much detail as to what you were doing before this happened? Like any/all files you flashed? the order you tried doing all of it? To me it sounds like a soft-brick but im not certain because ive never experience anything like this?
Try just powering off the device then hold Power and Volume Down at the same time and see what happens?
Try just turning on the phone and go into command prompt/terminal and do either an
Code:
adb devices
fastboot devices
and see if either can recognize the phone

My device wasn't detected by the PC

Today, I wanted to root my phone back after a MIUI update WITHOUT MY PERMISSION. So I lost my root and my custom recovery. So I went to my PC and do the same way I always do. But somehow, this time I boot my device into fastboot and the PC didn't detect my device. Before it worked just fine rooting my device. Now, I tried other ways but still the same problem, it didn't detect my device. Can someone please help me? I really really need the root for my phone. I don't know if it's about the low battery or any other problem. My device is currently in MIUI Global 9.5 | Stable | 9.5.3.0(MHOMIFA)
Please help! ??
DeLione said:
Today, I wanted to root my phone back after a MIUI update WITHOUT MY PERMISSION. So I lost my root and my custom recovery. So I went to my PC and do the same way I always do. But somehow, this time I boot my device into fastboot and the PC didn't detect my device. Before it worked just fine rooting my device. Now, I tried other ways but still the same problem, it didn't detect my device. Can someone please help me? I really really need the root for my phone. I don't know if it's about the low battery or any other problem. My device is currently in MIUI Global 9.5 | Stable | 9.5.3.0(MHOMIFA)
Please help!
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Have u enable usb debugging in developer setting...?
dinoredfield said:
Have u enable usb debugging in developer setting...?
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Yes I did. But it seems not to work too. Any other thing that I missed? The bootloader was unlocked long ago.
DeLione said:
Yes I did. But it seems not to work too. Any other thing that I missed? The bootloader was unlocked long ago.
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Try this.. its a simple way to enter the edl mode from fastboot..
https://forum.xda-developers.com/redmi-note-3/how-to/guide-reboot-to-edl-mode-fastboot-test-t3398718
dinoredfield said:
Try this.. its a simple way to enter the edl mode from fastboot..
https://forum.xda-developers.com/redmi-note-3/how-to/guide-reboot-to-edl-mode-fastboot-test-t3398718
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Can I root my phone using edl? I never used or heard that before.

BQ Aquaris U2 Lite Stuck at boot

Hi, my BQ Aquaris U2 Lite won't boot, I unlocked its bootloader and when I restart it, it is stuck at the next screen:
Your device software can't be checked for corruption. Please lock the bootloader.
If no key pressed:
Your device will boot in 5 seconds
But nothing happens, it stays there.
Help please, thank you.
@help38
The first time that an Android device boots up, the bootloader ( the Android counterpart to Windows BIOS/UEFI ) starts running. It is basically a software program that contains a list of OS instructions to ensure the smooth functioning of the device. Once this bootloader is unlocked, the user can manually change what ROM image was set as default by the OEM, and customize the device according to its liking.
Simply unlocking the bootloader does NOTHING than the Android OS now is waiting for instruction what ROM to load and run
jwoegerbauer said:
@help38
The first time that an Android device boots up, the bootloader ( the Android counterpart to Windows BIOS/UEFI ) starts running. It is basically a software program that contains a list of OS instructions to ensure the smooth functioning of the device. Once this bootloader is unlocked, the user can manually change what ROM image was set as default by the OEM, and customize the device according to its liking.
Simply unlocking the bootloader does NOTHING than the Android OS now is waiting for instruction what ROM to load and run
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Click to collapse
Hi, thank you, but my phone is stuck at that screen and nothing happens, I can't boot Android, do you know what is happening?
I unlocked the bootloader with BQ Firmware Flash Tool, because the phone only loaded Android Recovery, and didn't boot up the OS.
I only want to recover my files and photos
Thank you again.
@help38
I think you've to flash a Custom ROM. Note that's only possible if USB debugging got enabled on phone before unlocking the bootloader took place.
jwoegerbauer said:
@help38
I think you've to flash a Custom ROM. Note that's only possible if USB debugging got enabled on phone before unlocking the bootloader took place.
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How can I do that?
I didn't have USB debugging enabled, aren't there any other ways to recover my files?
Thank you.
help38 said:
How can I do that?
I didn't have USB debugging enabled, aren't there any other ways to recover my files?
Thank you.
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Click to collapse
No other methods, AFAIK
Even doing a Factory Reset doesn't relock the bootloader.
BTW: The 1st thing of all things an Android user should do is to enable USB debugging on his phone: that makes it all easier.
jwoegerbauer said:
No other methods, AFAIK
Even doing a Factory Reset doesn't relock the bootloader.
BTW: The 1st thing of all things an Android user should do is to enable USB debugging on his phone: that makes it all easier.
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, thank you, but, do you know if there is someone who could recover the files by paying him?
I really want those files
help38 said:
, thank you, but, do you know if there is someone who could recover the files by paying him?
I really want those files
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Repair service?
jwoegerbauer said:
Repair service?
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I don't think they could, but I will try, thanks.
jwoegerbauer said:
Repair service?
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Click to collapse
They told me that they can't...
Do you know any other place to recover my photos?
Thank you again.
At least is there a way to unbrick the phone?
Thanks.
Help please

Flash Tool without PC No Root ?!

Hi! is there any flash tool for android without root or PC ?
Samarimama said:
Hi! is there any flash tool for android without root or PC ?
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Root is required to flash.
So how to root android 6.0.1 without PC ?
Samarimama said:
So how to root android 6.0.1 without PC ?
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You will encounter difficulties trying to root 6.0.1. without Windows.
-- You can try this toolkit or search using your favorite search engine.
My device is Samsung Note 4 (SM-N910F or SM-N910W8)
Because it can't be recognized by my PCs.
Samarimama said:
My device is Samsung Note 4 (SM-N910F or SM-N910W8)
Because it can't be recognized by my PCs.
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You can attempt to put the phone into download mode to attempt to root it (by powering off then pressing the home key, volume down button and power button simultaneously).
Then press the volume down key to cancel the operation and restart the phone (without rooting it). It might connect to your computer and become recognized.
After which, try a factory cable and your computer might immediately recognized the phone was plugged into it and be able to access everything on the device.
I already try it without knowing this trick.
Before, I was thinking that all Note 4 have a problem named the eMMc error, but others owners of this phone were able to connect with the PC. So I changed the cables and PCs, maked a factory reset several times, root it and unlock the bootloader to flash a new ROM.
Now, I think that the kernel is corrupted.
rodken said:
You will encounter difficulties trying to root 6.0.1. without Windows.
-- You can try this toolkit or search using your favorite search engine.
Click to expand...
Click to collapse
It is for mobile ?
Samarimama said:
It is for mobile ?
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Negative.
-- If you are adamant about rooting without the help of Windows, considering King Root & Kingo Root.
It doesn't work for my device. It says that it is for device with Android 5 and beyond.
Tried more than 5 times.
So, it is why I want to downgrade without PC.
Samarimama said:
So, it is why I want to downgrade without PC.
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Bottom line
--
Although you wish to know how to downgrade Android without Windows, it is quite impossible to do safely.
The device may face serious ramifications that cannot be recovered in the future. You see, downgrade requires your phone to be rooted or unlocking bootloader. It is an entirely different subject to work on.
And it will require Windows nonetheless.
I know that I need Windows, but the device isn't recognized by many PCs using Windows 7 10 and 11.
Only thing I want is to flash a custom rom for the Samsung Note 4
Samarimama said:
Only thing I want is to flash a custom rom for the Samsung Note 4
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Were able to do a deep dive into your favorite search engine?
What do you mean by "deep dive" ? I already look at these wesites.
Samarimama said:
What do you mean by "deep dive" ? I already look at these wesites.
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'Deep dive' refers to at least search through for at least a good 60 minutes or so.
-- Look for articles/hits that date back to 2017.
-- Read up on the ideas that others did for other devices with similar issues.
Ok, thanks!
I made a deep dive but it doesn't work.
Th error's code is code 43.
Many people say to update the drivers and uninstall the device that doesn't work properly.
I also chaged the USB ports.

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