Bootloop and "unable to mount data" - Huawei Ascend P7

Hey guys,
Need some help here as I've checked everywhere I possibly can and can't find the answer. I've rooted phone then installed miui 6 rom which worked but i didnt like it. Then I tried to install my rom 3.3 and everything got fuked up. Now when i power on my phone it is in bootloop. At this moment i am only able to use twrp 2.7.1.0(only recovery that is working) and fastboot. I've tried wiping data through recovery and still nothing. Anyways my bootloader isunlocked. .
Also I've tried the forced update method to get it working again but for some reason I cant start it, just a bootloop.
When i try to install custom rom it just give me message "unable to mount data". Same message i get when i try to do factory reset or wipe data.
Appreciate the help guys.

Tomislav995 said:
Hey guys,
Need some help here as I've checked everywhere I possibly can and can't find the answer. I've rooted phone then installed miui 6 rom which worked but i didnt like it. Then I tried to install my rom 3.3 and everything got fuked up. Now when i power on my phone it is in bootloop. At this moment i am only able to use twrp 2.7.1.0(only recovery that is working) and fastboot. I've tried wiping data through recovery and still nothing. Anyways my bootloader is unlocked. .
Also I've tried the forced update method to get it working again but for some reason I cant start it, just a bootloop.
When i try to install custom rom it just give me message "unable to mount data". Same message i get when i try to do factory reset or wipe data.
Appreciate the help guys.
Click to expand...
Click to collapse
The force update will not work since you replaced the stock recovery from Huawei with TWRP.
Follow these steps:
1. Go to Huawei's website and download the UPDATE.APP package.
2. Go to Huawei's website and download the Update Extractor tool.
3. Use the downloaded tool to extract the UPDATE.APP package. Then you should have a folder filled with .img files such as system.img, recovery.img etc.
4. Connect your device to your PC and enter fastboot on your Ascend P7 device
5. Open up Command Prompt or Terminal (cmd for Windows, terminal for Linux) and go to the directory where fastboot is installed
6. Check to see if your PC finds your device using the command: "fastboot devices". If successful, you should find your phone listed.
7. Flash this partition images using these commands:
"fastboot flash boot /path/to/your/images/boot.img"
"fastboot flash system /path/to/your/images/system.img"
"fastboot flash cache /path/to/your/images/cache.img"
"fastboot flash cust /path/to/your/images/cust.img"
"fastboot flash userdata /path/to/your/images/userdata.img"
5. Reboot your device
Now if successful, your phone should have EMUI installed on it. Hope this helps you.

MihaiChirculete said:
The force update will not work since you replaced the stock recovery from Huawei with TWRP.
Follow these steps:
1. Go to Huawei's website and download the UPDATE.APP package.
2. Go to Huawei's website and download the Update Extractor tool.
3. Use the downloaded tool to extract the UPDATE.APP package. Then you should have a folder filled with .img files such as system.img, recovery.img etc.
4. Connect your device to your PC and enter fastboot on your Ascend P7 device
5. Open up Command Prompt or Terminal (cmd for Windows, terminal for Linux) and go to the directory where fastboot is installed
6. Check to see if your PC finds your device using the command: "fastboot devices". If successful, you should find your phone listed.
7. Flash this partition images using these commands:
"fastboot flash boot /path/to/your/images/boot.img"
"fastboot flash system /path/to/your/images/system.img"
"fastboot flash cache /path/to/your/images/cache.img"
"fastboot flash cust /path/to/your/images/cust.img"
"fastboot flash userdata /path/to/your/images/userdata.img"
5. Reboot your device
Now if successful, your phone should have EMUI installed on it. Hope this helps you.
Click to expand...
Click to collapse
I tried that long ago, but it said it cant write to data or smth like that.

Related

[Q] Huawei p7 Bootloop

A couple of days ago my Huawei p7 started to shut itself down and after that it keeps rebooting.
It starts itself up and I get into the choose your language screen and then it shuts down.
When i try to get into the system recovery (using volume & power) I get the following screen:
Android system recovery <3e>
Huawei software installed failed.
Please retry!
Shutdown system now
There is no UPDATE.APP
.............................................
FAIL
And even in system recovery it keeps rebooting.
Im kinda helpless at the moment not knowing what to do.
Did this occur to anyone ? Is there a solution for this problem ?
Thanks in advance.
You should download firmware update file from Huawei Official web site. Extract dload folder from downloaded archive and put it on your SD card. After that you should try to trigger firmware update with factory reset (method which is usually called "force update") by holding all three buttons when the phone is turned off.
But maybe your phone have some hardware problem if it restarts even in recovery mode.
UPDATE:
Does phone restarts itself when it's in fastboot mode (you can get into that mode by holding VOLUME DOWN and POWER button while phone is turned off and connected into USB port of computer just before pressing that button combination) ??
wekii said:
You should download firmware update file from Huawei Official web site. Extract dload folder from downloaded archive and put it on your SD card. After that you should try to trigger firmware update with factory reset (method which is usually called "force update") by holding all three buttons when the phone is turned off.
But maybe your phone have some hardware problem if it restarts even in recovery mode.
UPDATE:
Does phone restarts itself when it's in fastboot mode (you can get into that mode by holding VOLUME DOWN and POWER button while phone is turned off and connected into USB port of computer just before pressing that button combination) ??
Click to expand...
Click to collapse
I've downloaded the update file and proceeded with your steps. I continued to trigger the firmware update with the factory reset.
At first it seemed to work, the phone started updating but after a couple of seconds it started to reboot itself again
I got the phone in fastboot mode and at this moment it does not restart itself !
I went on downloading Hisuite and at this moment it keeps searching for drivers on the network.
The searching for drivers is taking quite some time is this normal ?
Thank you very much for your help so far !
OK, maybe these are good news if you say that your phone doesn't restart when it's in fastboot mode.
I would recommend you to try to reflash your phone's stock recovery and boot images with those extracted from firmware that you are trying to install.
Follow these steps:
Download Huawei Extractor tool from here,
Open update.app with Huawei Extractor and extract next two images: RECOVERY and BOOT (you can do that by selecting those two images while holding CTRL button, then right click > Extract Selected),
When extracted, rename those two images into "recovery.img" and "boot.img",
Copy those two images into "platform-tools" folder of Android SDK,
Run command prompt and go to "platform-tools" folder by using "cd" command,
Start your phone into fastboot mode,
Enter following command into command prompt: "fastboot devices" (without quotes), you should get your phone's serial number listed, if that's right, go to the next step,
Enter: "fastboot oem get-bootinfo", it needs to say that your bootloader is unlocked. If it's not you need to enter the next command "fastboot oem unlock 1234567812345678", where "1234567812345678" should be replaced with unlock code that is unique for your device. Instructions which explain how to obtain unlock code for your device can be found here,
Flash your phone's recovery with "fastboot flash recovery recovery.img",
Flash your phone's boot image with: "fastboot flash boot boot.img",
After successful flashing of both images, turn your phone off by holding POWER button for a several seconds,
Prepare SD card on your PC by formatting SD card and copying "dload" folder of phone's firmware onto SD card,
After you insert SD card into phone, start your phone with "forced install" method by holding all three buttons on your phone.
After that your phone should process firmware install successfully if there is no some hardware issues. Good luck and inform us about your progress.
wekii said:
OK, maybe these are good news if you say that your phone doesn't restart when it's in fastboot mode.
I would recommend you to try to reflash your phone's stock recovery and boot images with those extracted from firmware that you are trying to install.
Follow these steps:
Download Huawei Extractor tool from here,
Open update.app with Huawei Extractor and extract next two images: RECOVERY and BOOT (you can do that by selecting those two images while holding CTRL button, then right click > Extract Selected),
When extracted, rename those two images into "recovery.img" and "boot.img",
Copy those two images into "platform-tools" folder of Android SDK,
Run command prompt and go to "platform-tools" folder by using "cd" command,
Start your phone into fastboot mode,
Enter following command into command prompt: "fastboot devices" (without quotes), you should get your phone's serial number listed, if that's right, go to the next step,
Enter: "fastboot oem get-bootinfo", it needs to say that your bootloader is unlocked, if it's not read this,
Flash your phone's recovery with "fastboot flash recovery recovery.img",
Flash your phone's boot image with: "fastboot flash boot boot.img",
After successful flashing of both images, turn your phone off by holding POWER button for a several seconds,
Prepare SD card on your PC by formatting SD card and copying "dload" folder of phone's firmware onto SD card,
After you insert SD card into phone, start your phone with "forced install" method by holding all three buttons on your phone.
After that your phone should process firmware install successfully if there is no some hardware issues. Good luck and inform us about your progress.
Click to expand...
Click to collapse
Hi,
I've got the same issue.
When I start to "force install" method, my phone doesn't boot.
It just stay in a state of "charging" but nothing append.
I flashed boot and recovery with Fastboot.
But now, when I start the phone in Fastboot&Rescue Mode, the device doesn't appear in the liste when I run adb devices.
But when I start in the "force install" mode, adb devices returns the serial of the phone (but it doesn't respond to fastboot command).
Are there other files to flash on the phone than juste recovery and boot ?
Thank's for those steps, i'll continue to try to flash again.
Edit :
Ok phone is back !
The problem came from my SD Card, I had not only the dload folder, but an other file.
Format SD Card -> dload folder -> "force install" method -> ENJOY !
Thank's a lot !
wekii said:
OK, maybe these are good news if you say that your phone doesn't restart when it's in fastboot mode.
I would recommend you to try to reflash your phone's stock recovery and boot images with those extracted from firmware that you are trying to install.
Follow these steps:
Download Huawei Extractor tool from here,
Open update.app with Huawei Extractor and extract next two images: RECOVERY and BOOT (you can do that by selecting those two images while holding CTRL button, then right click > Extract Selected),
When extracted, rename those two images into "recovery.img" and "boot.img",
Copy those two images into "platform-tools" folder of Android SDK,
Run command prompt and go to "platform-tools" folder by using "cd" command,
Start your phone into fastboot mode,
Enter following command into command prompt: "fastboot devices" (without quotes), you should get your phone's serial number listed, if that's right, go to the next step,
Enter: "fastboot oem get-bootinfo", it needs to say that your bootloader is unlocked, if it's not read this,
Flash your phone's recovery with "fastboot flash recovery recovery.img",
Flash your phone's boot image with: "fastboot flash boot boot.img",
After successful flashing of both images, turn your phone off by holding POWER button for a several seconds,
Prepare SD card on your PC by formatting SD card and copying "dload" folder of phone's firmware onto SD card,
After you insert SD card into phone, start your phone with "forced install" method by holding all three buttons on your phone.
After that your phone should process firmware install successfully if there is no some hardware issues. Good luck and inform us about your progress.
Click to expand...
Click to collapse
I followed all your steps but i get stuck at step 7. When I give the command fastboot devices it doesn't show my phone's serial number. Instead it shows a ? (question mark).
Did I do something wrong or is there a solution for this?
Thanks in advance!
Maybe you should try other version of platform tools. I would recommend you to download adt-bundle-windows-x86_64-20140702.zip (x64) or adt-bundle-windows-x86-20140702.zip (x32) from "Android SDK" official web pages (I assume that your are using Windows OS). After download extract only "platform-tools" directory to the root of Windows C:\ partition and try described procedure again.
However if you are still getting question marks instead of phone's serial number, you should ignore that step and go onto the next one. I had the same problem in the past and flash commands were successful even serial number wasn't been displayed.
Keep us informed about your progress. Good luck zbnd !!
wekii said:
Maybe you should try other version of platform tools. I would recommend you to download adt-bundle-windows-x86_64-20140702.zip (x64) or adt-bundle-windows-x86-20140702.zip (x32) from "Android SDK" official web pages (I assume that your are using Windows OS). After download extract only "platform-tools" directory to the root of Windows C:\ partition and try described procedure again.
However if you are still getting question marks instead of phone's serial number, you should ignore that step and go onto the next one. I had the same problem in the past and flash commands were successful even serial number wasn't been displayed.
Keep us informed about your progress. Good luck zbnd !!
Click to expand...
Click to collapse
Thanks for your response !
So I followed through like you said. Gave the fastboot oem get-bootinfo command and then I got (bootloader) locked. So I followed the bootloader's unlock code (official way), entered my product SN and product IMEI, used the Huawei Product ID generator followed the procedure and all I get is : Please input the correct Product ID
What did I do wrong this time ? I'm not sure if it's even possible to do this wrong. Is there another way around ?
You can unlock with Vroot, like I did. I didn't try to get a serial from Huawei.
For the Fastboot command 'Fastboot device's I had a ? too, but with 'adb devices' command, I got my serial number.
Sent from my HUAWEI P7-L10 using XDA Free mobile app
Pboguet said:
You can unlock with Vroot, like I did. I didn't try to get a serial from Huawei.
For the Fastboot command 'Fastboot device's I had a ? too, but with 'adb devices' command, I got my serial number.
Sent from my HUAWEI P7-L10 using XDA Free mobile app
Click to expand...
Click to collapse
I've downloaded Vroot (english version) but when i connect my phone it says not support mode
I tried to connect while in fastboot&rescue mode, because this is the only way the phone stays on without restarting.
I then tried to connect without fastboot&rescue mode. But my phone keeps rebooting. I did get a message that USB debugging is disabled. However I can't enable usb debugging because my phone won't boot up normally.
@Pboguet
You should read carefully because your answer has no sense for the phone which is in state like zbnd's phone is.
 @zbnd
Maybe you are doing something wrong. You can send me your's phone serial number and IMEI in PM inbox, I will try to generate unlock code for you.
wekii said:
@Pboguet
You should read carefully because your answer has no sense for the phone which is in state like zbnd's phone is.
@zbnd
Maybe you are doing something wrong. You can send me your's phone serial number and IMEI in PM inbox, I will try to generate unlock code for you.
Click to expand...
Click to collapse
Thank you very much for all your help!
Despite following all your steps my phone keeps rebooting
Sorry to hear that. Did you manage to make all steps that I described to you? Can you share more informations about your current efforts please.
wekii said:
Sorry to hear that. Did you manage to make all steps that I described to you? Can you share more informations about your current efforts please.
Click to expand...
Click to collapse
Ik
After unlocking my phone I got the message unlocked in CMD.
I then flashed recovery and boot. Both times it said that the flash was succesfull, this only took a few seconds I don't know if thats normal? I then followed your last steps ( dload folder etc) and put the SD card in my phone.
It start installing but after approximetaly 25 seconds the phone shuts itself down and then reboots.
The procedure then starts again and it starts installing followed by shutting down and rebooting.
I'm sorry to hear that. Seems like it's some hardware issue.
However I still have one more idea that you can try in fastboot mode. I would recommend you to install entire firmware manually with fastboot commands.
By following previously described procedure try to extract with "Huawei Extractor" tool next images also: SYSTEM, USERDATA, CUST and CACHE.
After step number 10, try to use next commands also:
"fastboot flash system system.img"
"fastboot flash cust cust.img"
"fastboot flash userdata userdata.img"
"fastboot flash cache cache.img"
When you are finished with flashing of all images, use "fastboot reboot" command to restart your phone. Steps 11, 12 and 13 should be ignored this time.
Let me know the result
Hey, I'm glad I found this forum, because I have exactly the same problem! Since zbnd did not reply I wanted to let you know that flashing boot.img, recovery.img, cache.img, userdata.img, cust.img and system.img via fastboot did not work
The commandline for each file said "OKAY" and "finished" therefore I assume the process(es) completed succesfully.
Maybe I should tell you some information and the steps I did with my P7:
- my device is a branded german telekom version with firmware P7-L10-V100R001C150B122​- because of crappy pink telekom bootlogo und bloatware I wanted to flash the original huawei firmware so I downloaded the B126 from the official website and updated via force update method​- at the end of the update process i got the messages "huawei cust fail" and "update_post_process fail" but when I rebootet the B126 was installed and showed a message "Defect report reminders - This is an internal test version. Please report defects to Yangyexiao 00143718" - can't be correct, I thought​- after googling a lot and reading through several forums I rooted my device with RootGenius, installed HiSuite and Android-SDK (driver were installed correctly, adb devices showed a device with serial) and deleted the "cust" directory on my phone - at that point everything still worked​- next step: I installed TWRP 2.7.1.0, made an updateable zip file with huawei update extractor (including system.img, userdata.img, cust.img and boot.img) and flashed it via TWRP. The process completed succesfully, but needed only a few seconds. After that I got this bootloop at the language selection​- then I wanted to return to the last functioning state, so I flashed the stock recovery via fastboot and started with force update method. But after a few seconds the device rebooted during the update process which led to another (maybe the same) bootloop. I had to remove the sd card, but the device continued to reboot in recovery mode. So i installed TWRP 2.7.1.0 again​- Then I tried to restore a B133 backup I got from another forum, but it obviously did not work (see attached image)​
Now I just don't know what to do ... I get a bootloop in stock recovery and I get a bootloop in TWRP 2.8.0.0.
Only TWRP 2.7.1.0 does not reboot. What is about the other files inside the UPDATE.APP (modemimage.img, efi.img, etc)? Is it possible that some of these files are needed?
Thanks in advance...
mbert said:
Hey,
Only TWRP 2.7.1.0 does not reboot.
Thanks in advance...
Click to expand...
Click to collapse
If this recovery works than try:
1. Save this Se7en or this HRT or this custom MIUI ROM on SD card
2 .Wipe in TWRP everything (dalvik, system,data,cust, internal) except external (SD card). Internal only if You have a backup or not important data there.
4. Install zipp ROM from external memory. Sometimes try more than one time in fail case. For HRT ROM especially.
Let me know if helped.
Ziółek said:
If this recovery works than try:
1. Save this Se7en or this HRT or this custom MIUI ROM on SD card
2 .Wipe in TWRP everything (dalvik, system,data,cust, internal) except external (SD card). Internal only if You have a backup or not important data there.
4. Install zipp ROM from external memory. Sometimes try more than one time in fail case. For HRT ROM especially.
Let me know if helped.
Click to expand...
Click to collapse
failed
I tried se7en and miui.
I wiped dalvik,system,data,internal,cache and custom, which only lasted about 2 seconds, but said succesful (Is that enough to delete all partitions?).
Installation of both custom roms completed succesfully and lastet several seconds (max 1 min I think).
Se7en: reboot -> huawei logo -> reboot -> language selection (in the style of stock rom?) -> reboot ...
Miui: reboot -> miui logo -> reboot -> language selection (miui style) -> reboot -> wifi selection (I skipped) -> searching for sim card -> reboot
mbert said:
Hey, I'm glad I found this forum, because I have exactly the same problem! Since zbnd did not reply I wanted to let you know that flashing boot.img, recovery.img, cache.img, userdata.img, cust.img and system.img via fastboot did not work
The commandline for each file said "OKAY" and "finished" therefore I assume the process(es) completed succesfully.
Maybe I should tell you some information and the steps I did with my P7:
- my device is a branded german telekom version with firmware P7-L10-V100R001C150B122​- because of crappy pink telekom bootlogo und bloatware I wanted to flash the original huawei firmware so I downloaded the B126 from the official website and updated via force update method​- at the end of the update process i got the messages "huawei cust fail" and "update_post_process fail" but when I rebootet the B126 was installed and showed a message "Defect report reminders - This is an internal test version. Please report defects to Yangyexiao 00143718" - can't be correct, I thought​- after googling a lot and reading through several forums I rooted my device with RootGenius, installed HiSuite and Android-SDK (driver were installed correctly, adb devices showed a device with serial) and deleted the "cust" directory on my phone - at that point everything still worked​- next step: I installed TWRP 2.7.1.0, made an updateable zip file with huawei update extractor (including system.img, userdata.img, cust.img and boot.img) and flashed it via TWRP. The process completed succesfully, but needed only a few seconds. After that I got this bootloop at the language selection​- then I wanted to return to the last functioning state, so I flashed the stock recovery via fastboot and started with force update method. But after a few seconds the device rebooted during the update process which led to another (maybe the same) bootloop. I had to remove the sd card, but the device continued to reboot in recovery mode. So i installed TWRP 2.7.1.0 again​- Then I tried to restore a B133 backup I got from another forum, but it obviously did not work (see attached image)​
Now I just don't know what to do ... I get a bootloop in stock recovery and I get a bootloop in TWRP 2.8.0.0.
Only TWRP 2.7.1.0 does not reboot. What is about the other files inside the UPDATE.APP (modemimage.img, efi.img, etc)? Is it possible that some of these files are needed?
Thanks in advance...
Click to expand...
Click to collapse
To use fastboot you need to unlock bootloader first. And before flash, you need to erase partition first, for a proper job. Please read well about the fastboot procedure is a dangerous procedure
My bootloader is unlocked, but fastboot sais I don't have permission to erase partitions ...
Gesendet von meinem HUAWEI P6-U06 mit Tapatalk

[TUTORIAL] Applying an OTA update with stock + root/custom recovery

Preamble
As the title suggests, I had a Nexus 5 running stock Android 5.0, with root and TWRP, and wanted to update to Android 5.0.1 (without losing all my data, of course). I couldn't find any guides for my particular circumstances, so after working out how to do it myself, I thought I'd share my method.
Note: This guide is not for the uninitiated. Be prepared to Google something for yourself if you don't understand it.
Prerequisites
Before starting this guide, you should have:
A Nexus 5 that running stock Android. The presence of root/Xposed/custom recovery (maybe custom kernels?) shouldn't be relevant, but I can't vouch for the efficacy of this guide if you've done something obscure to your install.
Android SDK tools, specifically the ADB and fastboot binaries. Additional USB drivers may be required on Windows.
The factory image for the Android version you are currently running.
1. Uninstall root and other /system modifications
If you have rooted your Android, and/or installed BusyBox, Xposed or other modifications to /system, you will need to uninstall these modifications. Failing to do so will cause the OTA to complain that there's something funky going on in your /system partition.
You may be able to manually uninstall each of these modifications, but this was not enough for my install – doing a ‘Full unroot’ in SuperSU still left behind files in /system. The easiest way to uninstall all /system modifications is to reflash the /system partition.
Extract the Nexus 5 factory image (e.g. hammerhead-lrx21o-factory-01315e08.tgz), yielding a directory with files such as flash-all.bat and image-hammerhead-XXXXXX.zip. Do not use the flash-all script, as this will unnecessarily wipe all data on the device.
Extract the image-hammerhead-XXXXXX.zip file, specifically the system.img file.
Open a command prompt/terminal window.
Connect the phone to the computer with a USB cable.
Boot the phone into the bootloader.
Method 1: Power down the phone, then hold VolUp + VolDn + Power until the phone boots into the bootloader.
Method 2: From the terminal, run adb reboot bootloader while the phone is still powered on.
From the terminal, run fastboot flash system /path/to/system.img.
2. Uninstall any custom recovery
Custom recoveries don't seem to support OTA updates, making it necessary to uninstall the custom recovery by reflashing the stock recovery.
Extract the recovery.img file from the factory image, as in Part 1.
Open a command prompt/terminal window, connect the phone to the computer, and boot into the bootloader, as in Part 1.
From the terminal, run fastboot flash recovery /path/to/recovery.img.
Optional: Reflash boot.img and/or cache.img
Some users have reported that reflashing system.img was not sufficient, and that reflashing boot.img and/or cache.img was also necessary. I did not have this problem, but if you do:
Extract the boot.img and/or cache.img files from the factory image, as in Part 1.
Open a command prompt/terminal window, connect the phone to the computer, and boot into the bootloader, as in Part 1.
From the terminal, run fastboot flash boot /path/to/boot.img.
From the terminal, run fastboot flash cache /path/to/cache.img.
3. Apply the OTA update
The simple part. In the bootloader, use the VolUp/VolDn buttons to select ‘Start’, then press the Power button, to reboot into Android. Follow the system update instructions to install the OTA update.
4. Reflash the custom recovery and re-root
Also self-explanatory.
Hey,
I just wanted to say thanks. This totally fixed the problem I was having. I also want to add that after I flashed the system.img, I was getting errors related to "EMMC:/dev/block/platform/msm_sdcc.1/by-name/boot" with a bunch of numbers after. I googled it and found I had to also flash boot.img, and after that, the OTA worked fine. I would assume if anyone else gets errors like this, they should flash whatever img it shows in the error (ie: mine said /by-name/boot so I flashed boot.img).
-BGM
It worked for me
I've always been using a toolkit for my rooting purposes, I have done Full Unroot on SuperSU, but still getting an error when trying to update to 5.0.1
Will flashing stock wipe everything(whatsapp image, camera's,messages, etc etc)on my phone?
azlan96 said:
I've always been using a toolkit for my rooting purposes, I have done Full Unroot on SuperSU, but still getting an error when trying to update to 5.0.1
Will flashing stock wipe everything(whatsapp image, camera's,messages, etc etc)on my phone?
Click to expand...
Click to collapse
I also had problems using ‘Full Unroot’ in SuperSU. It's not actually as ‘full’ as it sounds.
Flashing a full factory image would normally wipe everything, but carefully following this guide will only reset the /system partition, not any user data.
I'd like to say thank you very much! I was looking for this kind of tutorial... I encountered an error while following all the steps because I forgot I had a custom kernel. So I wanted to add that if you have a custom kernel remember to do the same steps as described above for the kernel (return to stock) and then follow the system and recovery steps afterwards.
If you don't like running commands in terminal you can use Nexus Root Toolkit, on advanced, you have all the commands you need available.
Thank you very much RunasSudo
Taiyo85 said:
I'd like to say thank you very much! I was looking for this kind of tutorial... I encountered an error while following all the steps because I forgot I had a custom kernel. So I wanted to add that if you have a custom kernel remember to do the same steps as described above for the kernel (return to stock) and then follow the system and recovery steps afterwards.
If you don't like running commands in terminal you can use Nexus Root Toolkit, on advanced, you have all the commands you need available.
Thank you very much RunasSudo
Click to expand...
Click to collapse
I have my ADB and Fastboot ok as confirmed by nexus root toolkit, but I am not sure on how to use terminal.. I launched command prompt but it doest recognise all the commands..
Tried Flash Stock + Unroot on Nexus Root Toolkit but the software will crash (fastboot.exe has stopped responding)
I am really clueless on what to do next..
azlan96 said:
I have my ADB and Fastboot ok as confirmed by nexus root toolkit, but I am not sure on how to use terminal.. I launched command prompt but it doest recognise all the commands..
Tried Flash Stock + Unroot on Nexus Root Toolkit but the software will crash (fastboot.exe has stopped responding)
I am really clueless on what to do next..
Click to expand...
Click to collapse
Flash Stock + Unroot wipes everything and defeats the purpose of the tutorial made by RunasSudo
First and foremost you should download Android SDK (Tools only) on http://developer.android.com/sdk/index.html and then ask to install the extra: Google USB Driver.
With Nexus Root Toolkit you don't need terminal, click on advanced and you should see options to flash through fastboot the system only, recovery and kernel. It is pretty straighforward and it asks where the .img are in your computer
Thanks! This guide worked.
For Ubuntu users, you need to install adb and fastboot with these commands :
sudo add-apt-repository ppahablet-team/tools && sudo apt-get update (optional)
sudo apt-get install android-tools-adb android-tools-fastboot
Thanks for the great step by step.
As with some of the other posters, re-flashing system.img was not enough for me, I had to also re-flash the boot.img. Once that was done, I had no problems side loading the update and am now running LRX22C.
I only seem to fiddle with adb once a year - when it OTA time comes - and can never seem to remember some of the steps that need to be taken. Reading through some of the other threads, I have a feeling a lot of people who rooted/custom recovery and cant do the OTA are going to be doing complete image re-flashes when this guide makes that completely unecessary.
thanks again,
.d
BananasGoMoo said:
I googled it and found I had to also flash boot.img, and after that, the OTA worked fine.
Click to expand...
Click to collapse
datcon said:
As with some of the other posters, re-flashing system.img was not enough for me, I had to also re-flash the boot.img.
Click to expand...
Click to collapse
Thanks for the feedback! I've added a note about boot.img to the OP.
+1 for flashing boot.img worked perfect after I did that.
I tried with this tutorial. I flashed system and recovery and then restart. Confirm OTA but I get ERROR.
Then I flashed boot as it was described. Now I don't get OTA In About phone, I'm still on 5.0.0, Check for updates now don't find update
Any idea?
UPDATE - UPDATE: After hour now it is here ... super, it works.
This walkthrough was most helpful! Ended up replacing the boot.img as well since I had ElementalX installed. My apps are optimizing as we speak. Thank you!
Worked for me. What a hassle!
Here is a summary of the process for those looking for a less wordy procedure, with a few added steps:
Download Nexus 5 5.0 (LRX21O) file (note: NOT 5.0.1 yet) https://developers.google.com/android/nexus/images
Unzip via 7-zip multiple times in order to get boot.img, recovery.img, system.img
Enable USB debugging: http://www.kingoapp.com/root-tutorials/how-to-enable-usb-debugging-mode-on-android-5-lollipop.htm
Plug phone into PC > cmd prompt where adb is installed > type "adb devices" to ensure connection is valid (will need to authorize via popup on phone > then "adb devices" should return your device id and "device"; if it says "unauthorized" then look for the popup on your phone)
adb reboot bootloader
Put system.img, recovery.img, and boot.img in same folder as fastboot.exe
Run commands:
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash boot boot.img
fastboot erase cache (this is optional. I didn't have to do it, but you might)
Use Volume Up/Down to select Start > press Power Button to reboot
Update via Settings > About Phone > System Update
Re-flash TWRP recovery:
Get the file from here: http://forum.xda-developers.com/showpost.php?p=57580889&postcount=1
adb reboot bootloader
fastboot flash recovery openrecovery-twrp-2.8.1.0-hammerhead.img
Paul22000 said:
Worked for me. What a hassle!
Here is a summary of the process for those looking for a less wordy procedure, with a few added steps:
1. Download Nexus 5 5.0 (LRX21O) file (note: NOT 5.0.1 yet) https://developers.google.com/android/nexus/images
2. Unzip via 7-zip multiple times in order to get boot.img, recovery.img, system.img
3. Enable USB debugging: http://www.kingoapp.com/root-tutorials/how-to-enable-usb-debugging-mode-on-android-5-lollipop.htm
4. Plug phone into PC > cmd prompt where adb is installed > type "adb devices" to ensure connection is valid (will need to authorize via popup on phone > then "adb devices" should return your device id and "device"; if it says "unauthorized" then look for the popup on your phone)
5. adb reboot bootloader
6. Put system.img, recovery.img, and boot.img in same folder as fastboot.exe
7. Run commands:
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash boot boot.img
8. Use Volume Up/Down to select Start > press Power Button to reboot
9. Update via Settings > About Phone > System Update
Click to expand...
Click to collapse
Maybe you could add `fastboot erase cache` as stepp 8.
gee2012 said:
Maybe you could add `fastboot erase cache` as stepp 8.
Click to expand...
Click to collapse
I added it to step 7, thanks. :good: I also cleaned up the formatting and added step 10 about re-flashing TWRP.
Loading problem
I flashed system, recovery & boot images strictly following the instructions, restarted the phone. It got stuck in loading where balls in four colors keep running for half an hour. Shall I keep waiting? I think there must be something wrong. Your advises are welcome.
guangy said:
I flashed system, recovery & boot images strictly following the instructions, restarted the phone. It got stuck in loading where balls in four colors keep running for half an hour. Shall I keep waiting? I think there must be something wrong. Your advises are welcome.
Click to expand...
Click to collapse
Try flash the partitions again. If it's still not working, you may need to reflash a factory image.
RunasSudo said:
Try flash the partitions again. If it's still not working, you may need to reflash a factory image.
Click to expand...
Click to collapse
I flashed the cache image as well, then the problem solved. Thanks

Unable to unroll from Nougat

Hey,
I enrolled to the Android Nougat program and rooted my phone (chainfire) a few days ago. Decided to un-root (using superSU), and it said I was unrooted. After doing the un-rooting, the OEM unlock-option was greyed out (and on OFF setting), but the phone recovery says it's unlocked api 3.... I pretty much just wanted to unenroll and go back to MM. Every time I choose unroll from Google, download the MM OTA and it reboots I get an error. Just an image of android with message "ERROR". The only way to get the phone working is to do a hard reset and go back to Nougat.
Not quite sure what is wrong here. Any suggestions?
It's probably because the SuperSU unroot hasn't cleaned up everything that the MM installer checks for. Your best bet is to use the sideload OTA here:
https://developers.google.com/android/nexus/ota
to install MM again. It's quick and easy, and doesn't touch your data.
Since you received the actual uninstall OTA you must have successfully unenrolled, so you should be ok from now on.
dahawthorne said:
It's probably because the SuperSU unroot hasn't cleaned up everything that the MM installer checks for. Your best bet is to use the sideload OTA here:
https://developers.google.com/android/nexus/ota
to install MM again. It's quick and easy, and doesn't touch your data.
Since you received the actual uninstall OTA you must have successfully unenrolled, so you should be ok from now on.
Click to expand...
Click to collapse
I received the OTA but while installing MM it gives me an error, so I have to go back to Nougat every time. I've tried the unenroll option several times and it gives me the same "error" every time. So, I should try manually flashing MM, then?
UPDATE:
I tried the following:
Downloaded and tried to sideload 6.0.1 (MOB30W) to my Nexus 6-device. It got up to 46% and after it gave me and error saying:
WARNING: No file_contexts. This package is for shamu devices; this is a "".
E: Error in /sideload/package.zip
Status 7
Installation aborted.
UPDATE2:
Tried another package. Didn't work. All the OTA updates stop at 46% giving me the same error. Device remains unlocked, but appears not to be rooted. Still stuck on Nougat.
What does "Tried another package" mean?
It may be that your download was corrupt. I always check the SHA with this checksum utility:
http://download.cnet.com/MD5-SHA-Checksum-Utility/3000-2092_4-10911445.html
though I've read in the instructions that the Android installation itself checks the package - it may be this error that the installation is reporting.
dahawthorne said:
What does "Tried another package" mean?
It may be that your download was corrupt. I always check the SHA with this checksum utility:
http://download.cnet.com/MD5-SHA-Checksum-Utility/3000-2092_4-10911445.html
though I've read in the instructions that the Android installation itself checks the package - it may be this error that the installation is reporting.
Click to expand...
Click to collapse
No, the checksum is fine. The package is fine. I mean I tried several OTA packages for N6 and it always stops at 46%. There's something else going on here. Maybe if I re-root with chainfire and the use another method to unroot it? Which is the correct method, I have no idea?
Factory reset, and try sideloading MOB30W again.
dahawthorne said:
Factory reset, and try sideloading MOB30W again.
Click to expand...
Click to collapse
Done it like 5 times already. Also wiped cache. No help.
Hannes084 said:
Done it like 5 times already. Also wiped cache. No help.
Click to expand...
Click to collapse
My suggestion is to go back to Android N, root with SuperSU and see if your OEM UNLOCK toggle in Developer Options is working again and not greyed out. Then I would fastboot flash back to MM and install TWRP and SuperSu.
Sent from my Nexus 6 using XDA-Developers mobile app
Dude, just flash the system image you want. Forget about the OTA
The OTA is a system image.
fast69mopar said:
My suggestion is to go back to Android N, root with SuperSU and see if your OEM UNLOCK toggle in Developer Options is working again and not greyed out. Then I would fastboot flash back to MM and install TWRP and SuperSu.
Sent from my Nexus 6 using XDA-Developers mobile app
Click to expand...
Click to collapse
Root with SuperSU? I think you mean with chainfire?
dahawthorne said:
The OTA is a system image.
Click to expand...
Click to collapse
You could say the new full otas are, but you can't go flashing them freely over newer images.
The unenroll option resets the phone anyways, so the best and aparently the only option for him is to flash the system image he wants from scratch.
blanco2701 said:
You could say the new full otas are, but you can't go flashing them freely over newer images.
The unenroll option resets the phone anyways, so the best and aparently the only option for him is to flash the system image he wants from scratch.
Click to expand...
Click to collapse
Sorry for asking but how would I even do that? I'm on Ubuntu 12, so it seems mega complicated.
Hannes084 said:
Sorry for asking but how would I even do that? I'm on Ubuntu 12, so it seems mega complicated.
Click to expand...
Click to collapse
Well my friend I have no idea since I'm on Windows. Google how to use adb and fastboot on ubuntu, there should be a solution for you.
This is a script that I used to run before the full OTAs became available. It worked many times for me, but the usual caveat - you follow it at your own risk. You can probably skip the backup step in your situation.
Preparation.
- Take a TWRP backup and save it on your PC.
- Download factory image and unzip all files, including the zip within the zip. Rename the *.img files to the names below. Copy all of them to the same folder as your ADB/fastboot executables.
- Download the relevant TWRP and rename to twrp.img - also put in ADB/fastboot folder.
- Copy SuperSU to device (if root wanted).
- Set USB debugging in Developer options & attach to your PC.
- Open a CMD window and check connectivity with "adb devices". If it's ok, copy & paste each command below into the CMD window and run them - the only lengthy one is the system.img.
1. adb reboot bootloader
2. fastboot flash bootloader bootloader.img
3. fastboot reboot-bootloader
4. fastboot flash radio radio.img
5. fastboot reboot-bootloader
6. fastboot erase system
7. fastboot flash system system.img
8. fastboot erase boot
9. fastboot flash boot boot.img
10. fastboot erase cache
11. fastboot flash cache cache.img
12. fastboot reboot-bootloader
13. fastboot flash recovery twrp.img
14. From bootloader boot to TWRP and reflash superSu
dahawthorne said:
This is a script that I used to run before the full OTAs became available. It worked many times for me, but the usual caveat - you follow it at your own risk. You can probably skip the backup step in your situation.
Preparation.
- Take a TWRP backup and save it on your PC.
- Download factory image and unzip all files, including the zip within the zip. Rename the *.img files to the names below. Copy all of them to the same folder as your ADB/fastboot executables.
- Download the relevant TWRP and rename to twrp.img - also put in ADB/fastboot folder.
- Copy SuperSU to device (if root wanted).
- Set USB debugging in Developer options & attach to your PC.
- Open a CMD window and check connectivity with "adb devices". If it's ok, copy & paste each command below into the CMD window and run them - the only lengthy one is the system.img.
1. adb reboot bootloader
2. fastboot flash bootloader bootloader.img
3. fastboot reboot-bootloader
4. fastboot flash radio radio.img
5. fastboot reboot-bootloader
6. fastboot erase system
7. fastboot flash system system.img
8. fastboot erase boot
9. fastboot flash boot boot.img
10. fastboot erase cache
11. fastboot flash cache cache.img
12. fastboot reboot-bootloader
13. fastboot flash recovery twrp.img
14. From bootloader boot to TWRP and reflash superSu
Click to expand...
Click to collapse
If I download the factory image (OTA) off google's site it has none of those files under the zip-folder.
Hannes084 said:
If I download the factory image (OTA) off google's site it has none of those files under the zip-folder.
Click to expand...
Click to collapse
One thing is the OTA image, and another is the Factory Image.
Download the factory image from here.
https://developers.google.com/android/nexus/images#shamu
Unzip everything and you should get all the files needed. As I said before, you would need to have a computer with adb and fastboot installed.
blanco2701 said:
One thing is the OTA image, and another is the Factory Image.
Download the factory image from here.
https://developers.google.com/android/nexus/images#shamu
Unzip everything and you should get all the files needed. As I said before, you would need to have a computer with adb and fastboot installed.
Click to expand...
Click to collapse
Thanks, doing that now!
Hannes084 said:
Thanks, doing that now!
Click to expand...
Click to collapse
Just be sure to have selected "oem unlocking" in the developer options, make a backup (everything will be wiped), and start flashing!. There are several guides everywhere.

My nexus will not flash correctly

Hello guys, ive been generally lucky in the sense that i have had no issues...until now.
I have tried installing the most recent updates (7.0, and now 7.1.1) and i continue to get this error through cmd. It does not seem to want to flash anything, and i have gotten it to flash, root, and twrp, but it still acted funky. Today, trying to remedy the situation, i attempted to flash the new 7.1.1 update, and return to stock (to later return to power user) but it is still doing it.
It says Bootloader: has-slot (not found), and a couple other things. When i try to flash individual pieces, it does not retain it. when i try to flash the flashall.bat, it flashes but does not flash everything, it will say the stuff has transferred 0 and skips it as it looks like. I cannot get my bootloader off the october one, and i have looked everywhere i can to try to fix this.. please help, its driving me mad. I will be happy to provide any information needed.
Thanks Community! You rock!
Have you tried a different USB cable? A different computer? How about a different USB AND a different computer? I think this would be a good place to start.
Can i ask you why this would matter? My usb seems to work fine, and my computer had no issues before this... i can still perform different actions, and my phone is showing up as ADB and Fastboot.
If it's not pc or usb cable related you can try to flash latest factory image step by step via fastboot without your simcard
Well, you might want to post the complete output of your flashing attempt, but if the bootloader slot isn't found, that's usually a sign of a hardware problem. Hopefully I'm wrong, but until we see more from you, I simply don't have an answer for you.
Ive tried to fastboot everything individually, and it refuses to take. I tried the flashall, same thing. I used NRT and it partially worked, but has sorta the same error. I will be flashing again and providing screenshots right now. I was able to get into a rom, root, twrp but i still cannot update all of those core things (bootloader, radio, and such) Thank you guys for the help. Much needed.
Here is the attempt to just flash the bootloader, i have tried from a different location but this is directly in Platform-Tools of the SDK. As you can also see, it does register under fastboot...
Try to flash radio and bootloader via twrp
https://forum.xda-developers.com/ne...-nexus-6-recovery-flashable-fastboot-t3066052
Did you try without simcard?
coremania said:
Try to flash radio and bootloader via twrp
https://forum.xda-developers.com/ne...-nexus-6-recovery-flashable-fastboot-t3066052
Did you try without simcard?
Click to expand...
Click to collapse
yes i have, i only do it with the simcard removed. Now whats weird is it says my bootloader is on 72.01, but my cmd clearly tells me its not working correctly...
coremania said:
Try to flash radio and bootloader via twrp
https://forum.xda-developers.com/ne...-nexus-6-recovery-flashable-fastboot-t3066052
Did you try without simcard?
Click to expand...
Click to collapse
I just tried what you suggest, and im not sure if it worked. It said everything wrote (on twrp) but it was very quickly done. I feel it did the same thing as CMD did.
You could try using the correct Fastboot command...
fastboot flash bootloader bootloader.img
The command is fastboot flash <partition> <image>
Your screenshot says only "fastboot flash image" but doesn't state the partition you're trying to load, hence "unknown partition".
And since we're on the subject, perhaps a repetition of the procedure I used to use before the full OTA days might be useful to you and other people.
Preparation.
- Take a TWRP backup and save it on your PC.
- Download factory image (https://developers.google.com/android/nexus/images#shamu) and unzip all files, including the zip within the zip. Rename the *.img files to the names below. Copy all of them to the same folder as your ADB/fastboot executables.
- Download the relevant TWRP and rename to twrp.img - also put in ADB/fastboot folder.
- Copy SuperSU to device (if root wanted).
- Set USB debugging in Developer options & attach to your PC.
- Open a CMD window, navigate to your ADB folder, and check connectivity with "adb devices". If it's ok, copy & paste each command below into the CMD window and run them - the only lengthy one is the system.img.
1. adb reboot bootloader
2. fastboot flash bootloader bootloader.img
3. fastboot reboot-bootloader
4. fastboot flash radio radio.img
5. fastboot reboot-bootloader
6. fastboot erase system
7. fastboot flash system system.img
8. fastboot erase boot
9. fastboot flash boot boot.img
10. fastboot erase cache
11. fastboot flash cache cache.img
12. fastboot reboot-bootloader
13. fastboot flash recovery twrp.img
14. From bootloader boot to TWRP and reflash superSu
dahawthorne said:
You could try using the correct Fastboot command...
fastboot flash bootloader bootloader.img
The command is fastboot flash <partition> <image>
Your screenshot says only "fastboot flash image" but doesn't state the partition you're trying to load, hence "unknown partition".
And since we're on the subject, perhaps a repetition of the procedure I used to use before the full OTA days might be useful to you and other people.
Preparation.
- Take a TWRP backup and save it on your PC.
- Download factory image (https://developers.google.com/android/nexus/images#shamu) and unzip all files, including the zip within the zip. Rename the *.img files to the names below. Copy all of them to the same folder as your ADB/fastboot executables.
- Download the relevant TWRP and rename to twrp.img - also put in ADB/fastboot folder.
- Copy SuperSU to device (if root wanted).
- Set USB debugging in Developer options & attach to your PC.
- Open a CMD window, navigate to your ADB folder, and check connectivity with "adb devices". If it's ok, copy & paste each command below into the CMD window and run them - the only lengthy one is the system.img.
1. adb reboot bootloader
2. fastboot flash bootloader bootloader.img
3. fastboot reboot-bootloader
4. fastboot flash radio radio.img
5. fastboot reboot-bootloader
6. fastboot erase system
7. fastboot flash system system.img
8. fastboot erase boot
9. fastboot flash boot boot.img
10. fastboot erase cache
11. fastboot flash cache cache.img
12. fastboot reboot-bootloader
13. fastboot flash recovery twrp.img
14. From bootloader boot to TWRP and reflash superSu
Click to expand...
Click to collapse
hahahaha well that could surely be the issue :silly:, but the one thing im wondering is why it wouldnt work through NRT, and i also "successfully" sideloaded the ota... Gonna try this now and hopefully it works! I shall report back when finished
dahawthorne said:
You could try using the correct Fastboot command...
fastboot flash bootloader bootloader.img
The command is fastboot flash <partition> <image>
Your screenshot says only "fastboot flash image" but doesn't state the partition you're trying to load, hence "unknown partition".
And since we're on the subject, perhaps a repetition of the procedure I used to use before the full OTA days might be useful to you and other people.
Preparation.
- Take a TWRP backup and save it on your PC.
- Download factory image (https://developers.google.com/android/nexus/images#shamu) and unzip all files, including the zip within the zip. Rename the *.img files to the names below. Copy all of them to the same folder as your ADB/fastboot executables.
- Download the relevant TWRP and rename to twrp.img - also put in ADB/fastboot folder.
- Copy SuperSU to device (if root wanted).
- Set USB debugging in Developer options & attach to your PC.
- Open a CMD window, navigate to your ADB folder, and check connectivity with "adb devices". If it's ok, copy & paste each command below into the CMD window and run them - the only lengthy one is the system.img.
1. adb reboot bootloader
2. fastboot flash bootloader bootloader.img
3. fastboot reboot-bootloader
4. fastboot flash radio radio.img
5. fastboot reboot-bootloader
6. fastboot erase system
7. fastboot flash system system.img
8. fastboot erase boot
9. fastboot flash boot boot.img
10. fastboot erase cache
11. fastboot flash cache cache.img
12. fastboot reboot-bootloader
13. fastboot flash recovery twrp.img
14. From bootloader boot to TWRP and reflash superSu
Click to expand...
Click to collapse
Unfortunately, it did not work. Now google app keeps crashing. Phone is extremely buggy.
Calko2882 said:
Unfortunately, it did not work. Now google app keeps crashing. Phone is extremely buggy.
Click to expand...
Click to collapse
Can you give a bit more detail? So the phone is crashing, but is it now on the version that you wanted to have (7.0, 7.1.1)? There is rarely such a thing as "too much information".
dahawthorne said:
Can you give a bit more detail? So the phone is crashing, but is it now on the version that you wanted to have (7.0, 7.1.1)? There is rarely such a thing as "too much information".
Click to expand...
Click to collapse
Ok, so what happens is that it says i am on 7.1.1 with i guess the related info, but it does not load in properly as you can see with the screenshots. I start up the initial setup, and i can get through most of it fine, but some areas *permissions* are all blotchy. like i can toggle them on to submit data but i cant see what it is exactly im agreeing to. Then i start the phone, Google App automatically crashes, along side system ui. When i updated them, it seemed to fix the problem. But the issue is, i am not receiving phone calls and texts until possibly days later, and when i send texts it says "sending" and proceeds to spam the hell outta whoever its going to (sends literally 30+ texts). When i call someone, my phones Do Not Disturb mode gets enabled, and then nicely cuts out my audio. I can turn this feature off when im in the call, but sometimes it will then glitch the phone app, and i cannot essentially "hangup". My phone also now dies at 9%, where it had not previously (when i was on other rom / older stock) This all started after i updated to the october patch, and i noticed in december that i didnt have the december patch / update. I went to install it, and the same exact thing occurred. Ive attempted a rescue ota, and a sideload ota, and now this stuff as well, but i fear the worst for my phone. Let me know if i need to add anything else
Strephon may be right in suggesting a hardware fault, but equally it may just be that your phone is now somehow corrupted. My only suggestion is that you nuke it - factory reset, TWRP, wipe everything again in TWRP, and then try installing from fresh using the 7.1.1 full (not OTA) image and the instructions I posted earlier. If it still doesn't work I'm out of ideas, but there are people with far greater experience here than I have, so don't give up. It's too nice a device to just write off.
Calko2882 said:
When i call someone, my phones Do Not Disturb mode gets enabled
Click to expand...
Click to collapse
That's a new feature of 7.1.1. So you won't have to listen to notifications while on the phone. It's disabled as soon as the phone call is over.
dahawthorne said:
Strephon may be right in suggesting a hardware fault...
Click to expand...
Click to collapse
I hope I'm wrong.

Is my phone has brick?

My smartphone was running on Android 9 pie. I am saying "was running" beacuse i am in a trouble now... I flashed a custom recovery(TWRP) and I installed a custom rom (LingeaOS) without wipping storage... from that time TWRP shows that "No os installed" .. It restart again and again but without starting android..Whenever I tried to restore my backuped stock rom It shows an error message"Failed to mount /system".. then I flashed another custom recovery(CWM).. And now it restart again and again I've tried to rebboot it in custom recovery mood but I 've failed... Is my Smartphone is bricked?? Is there any way to solve this problem??
This is how to fix it
Naim178 said:
My smartphone was running on Android 9 pie. I am saying "was running" beacuse i am in a trouble now... I flashed a custom recovery(TWRP) and I installed a custom rom (LingeaOS) without wipping storage... from that time TWRP shows that "No os installed" .. It restart again and again but without starting android..Whenever I tried to restore my backuped stock rom It shows an error message"Failed to mount /system".. then I flashed another custom recovery(CWM).. And now it restart again and again I've tried to rebboot it in custom recovery mood but I 've failed... Is my Smartphone is bricked?? Is there any way to solve this problem??
Click to expand...
Click to collapse
Yes, this is called a soft brick.
You can solve the problem by doing the following:
-Your bootloader should be unlocked, and I think you've already unlocked it since you were trying to flash a custom ROM.
-You need to have a STOCK ROM of your exact phone model, this is different from TWRP backup, search google for your phone model's stock rom and download.
-You should have Fastboot and ADB installed on your pc.
-boot to fastboot mode (volume up+power, then navigate to fastboot mode).
-connect your phone to pc with USB cable
-open the folder where you have downloaded the minimal adb and fastboot, and open cmd window there with right lick or click cmd-here.exe
-now type fastboot devices, and there should be an alphanumeric code. This means your device is connected. If it is not showing up, try downloading 'minimal adb and fastboot tool' and clicking cmd-here.exe.
-In the stock rom file, there will be a file called 'firmware', and inside it there should be these files: 'system.img' 'recovery.img' 'cache.img' 'userdata.img' 'boot.img'
-Copy all 5 of these, then go to the folder where you have adb and fastboot, go inside that folder( to the place where you have all the adb and fastboot files like adbWinApi.dll). Now paste the 5 files here.
-open cmd window again, and type the following:
1) fastboot erase boot
2) fastboot flash boot boot.img
3)fastboot erase system
4)fastboot flash system system.img
5)fastboot erase recovery
6)fastboot flash recovery recovery.img
7)fastboot erase cache
8)fastboot flash cache cache.img
9)fastboot erase userdata (this may be called data, if fastboot shows an error message, type data instead)
10)fastboot flash userdata userdata.img
and you are done, this should enable you to restore your phone.
If you are unable to access your bootloader, try flashing your stock ROM with SP Flash tool (if you have a mediatek device). You have to have your stock ROM downloaded on your pc. Connect phone to pc via usb, open SP Flash tool, select your firmware file in the topmost box, and in the box beneath that, select the file ending in scatter.txt from your firmware file. Uncheck 'preloader' if it shows up on your screen, then click 'download'. Do not disconnect your phone during the process. When it is finished, there will be a green tick, and you should be able to restart your device.

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