Database Develop

[SOLVED] E: Can't mount /cache/

I'm sorry to do this, but I don't know where to start. Here's what I did to get to where I'm at:
- previously running SlimBean flashed using TWRP
- Downloaded ROM Manager and it recommended installing CWM Recovery
- Followed prompts
- It installed CWM 6.0.4.8
- Booted back into ROM and used ROM Manager to attempt to flash SlimKat 4.4.2 build 6
- CWM wiped dalvik but then got hung up
- Now it keeps saying Can't mount /cache/recovery/command
I'm completely stuck. Can't figure out what to do next. Please help!!!

Have you tryed reflashing the recovery to rule out a faulty install of cwm?
I should say, have you tried reflashing cwm *through Fastboot* to rule out a faulty cwm install?

Use TWRP recovery, preferred is 2.6.3.3 although there are newer versions, enter recovery, wipe - format data, basically for some reason, fastboot erase cache wipes the cache into an un-readable format.
note: this will also erase your internal storage too, so if theres anything important you want on there, make sure you back it up first using the adb pull command.

dougeedug said:
Have you tryed reflashing the recovery to rule out a faulty install of cwm?
I should say, have you tried reflashing cwm *through Fastboot* to rule out a faulty cwm install?
Click to expand...
Click to collapse
I can't get it to recognize my devices in order to use ADB. When connected, I type ADB Devices and I don't see anything listed. Is there a way to check I'm doing this ok?
EDIT: Ok, I got it to recongize my device. I'm going to try flashing TWRP thru ADB....will report back shortly...
Seanie280672 said:
Use TWRP recovery, preferred is 2.6.3.3 although there are newer versions, enter recovery, wipe - format data, basically for some reason, fastboot erase cache wipes the cache into an un-readable format.
note: this will also erase your internal storage too, so if theres anything important you want on there, make sure you back it up first using the adb pull command.
Click to expand...
Click to collapse
I can't quite risk doing this yet. Only as a last, last resort...

cartisdm said:
I can't get it to recognize my devices in order to use ADB. When connected, I type ADB Devices and I don't see anything listed. Is there a way to check I'm doing this ok?
EDIT: Ok, I got it to recongize my device. I'm going to try flashing TWRP thru ADB....will report back shortly...
I can't quite risk doing this yet. Only as a last, last resort...
Click to expand...
Click to collapse
whilst your phone is in recovery and plugged into your computer, open device manager, is there a yellow ! where its says android devices or myHTC ?
IGNORE THIS, You got it working whilst I was typing this.

cartisdm said:
I can't get it to recognize my devices in order to use ADB. When connected, I type ADB Devices and I don't see anything listed.
Click to expand...
Click to collapse
Use the command "fastboot devices" from the bootloader with "fastbootUSB" highlighted. You can't use adb commands in the bootloader because adb is to interact with android, which is not running while in bootloader. Let me know if you get output with the "fastboot devices" command.
EDIT: I should specify, if you are trying to flash recovery from anywhere but the bootloader using fastboot commands (it sounds like you may be trying to flash recovery with adb commands), you are just doing it wrong. so lets get that sorted first.

cartisdm said:
I can't get it to recognize my devices in order to use ADB. When connected, I type ADB Devices and I don't see anything listed. Is there a way to check I'm doing this ok?
EDIT: Ok, I got it to recongize my device. I'm going to try flashing TWRP thru ADB....will report back shortly...
Click to expand...
Click to collapse
you flash a custom recovery with fastboot commands not adb commands.

Got it!!! Thank you everyone for taking the time. I have a flight in a few hours and I was panicking!!!!
I grabbed universal drivers from here: download.clockworkmod.[com]/test/UniversalAdbDriverSetup6.msi (remove the brackets around .com)
Then my computer picked up the device and I was able to install TWRP. Clockworkmod recovery still doesn't work, no matter which version I tried. I'll stick with TWRP for now.
Thanks again!
EDIT: Well eff me, it wiped my internal storage. It must have done it after I flashed because that's where I grabbed the zip in the first place. That sucks...

cartisdm said:
Got it!!! Thank you everyone for taking the time. I have a flight in a few hours and I was panicking!!!!
I grabbed universal drivers from here: download.clockworkmod.[com]/test/UniversalAdbDriverSetup6.msi (remove the brackets around .com)
Then my computer picked up the device and I was able to install TWRP. Clockworkmod recovery still doesn't work, no matter which version I tried. I'll stick with TWRP for now.
Thanks again!
EDIT: Well eff me, it wiped my internal storage. It must have done it after I flashed because that's where I grabbed the zip in the first place. That sucks...
Click to expand...
Click to collapse
did you format data inside twrp recovery, like I said above, that will erase your internal storage too, you will need to push a rom over to your internal storage now using adb and then flash it.

Seanie280672 said:
did you format data inside twrp recovery, like I said above, that will erase your internal storage too, you will need to push a rom over to your internal storage now using adb and then flash it.
Click to expand...
Click to collapse
I didn't do so intentionally, but it's possible I did it without paying attention. I'm back to my system now so I'll just live with the loss. I flashed an existing ROM that I had in my Downloads folder once I was able to get into TWRP. It's just weird that folder is empty now.

[Q] Error while installing 5.0.1 update

Hi I just got the 5.0.1 update, I downloaded it and the phone rebooted itself, I got the installation screen and after 5 seconds I just got the word "error" and I had to restart it manually; the device is rooted, have anyone else had this problem? I would appreciate your help

saman0suke1 said:
Hi I just got the 5.0.1 update, I downloaded it and the phone rebooted itself, I got the installation screen and after 5 seconds I just got the word "error" and I had to restart it manually; the device is rooted, have anyone else had this problem? I would appreciate your help
Click to expand...
Click to collapse
With lollipop you can't take an OTA if you are rooted or running just about anything else modified (custom kernels, like ones that have force decrypt disabled also will cause it to error out).
You can still flash it manually by flashing the images. If you don't want to wipe, don't flash the userdata.img . Also, if you aren't currently encrypted, booting up with the stock kernel will force encrypt your device, so don't flash that if you want to stay that way. You can then re-root. There are more in depth instructions for doing this out there if you search around for them.

My Nexus 6 took 5.0.1 just fine, but my Nexus 7 does this same thing, running stock ROM/Bootloader/Recovery/etc. The ONLY thing done to it is the Fastboot OEM unlock, but I doubt that alone would stop it. I'm curious to know what resolves this ( other than downloading the factory image and flashing it without wiping the userdata )

Just got same error. I didnt even root phone, bought it today, it installed apps from backup of my previous Nexus 4 and OTA is failing.

cupfulloflol said:
With lollipop you can't take an OTA if you are rooted or running just about anything else modified (custom kernels, like ones that have force decrypt disabled also will cause it to error out).
You can still flash it manually by flashing the images. If you don't want to wipe, don't flash the userdata.img . Also, if you aren't currently encrypted, booting up with the stock kernel will force encrypt your device, so don't flash that if you want to stay that way. You can then re-root. There are more in depth instructions for doing this out there if you search around for them.
Click to expand...
Click to collapse
So basically the only way is to flash the image manually? If I choose not to flash userdata.img my phone data (photos, contacts, apps, etc) won't be erased right? But I will lose root correct? Thanks!

saman0suke1 said:
So basically the only way is to flash the image manually? If I choose not to flash userdata.img my phone data (photos, contacts, apps, etc) won't be erased right? But I will lose root correct? Thanks!
Click to expand...
Click to collapse
Correct, with Lollipop if you modify things you basically are then forced to manually take the updates. Not that big of a deal as you would likely be needing a PC to reinstall your custom recovery or re-root anyhow after the update.
Flashing userdata.img isn't necessary to update. Neither is recovery.img if you want to keep a custom recovery.
Also as I mentioned before, if you have disabled encryption on your device, if you flash the stock kernel (boot.img) and boot up with it you will re-enable forced encryption. You will need to flash a kernel with force encryption disabled if you want to keep running without encryption. If you haven't disabled encryption, or don't care if your device re-encrypts (this doesn't erase anything, just may take a few minutes on first boot) then this doesn't matter.

cupfulloflol said:
Correct, with Lollipop if you modify things you basically are then forced to manually take the updates. Not that big of a deal as you would likely be needing a PC to reinstall your custom recovery or re-root anyhow after the update.
Flashing userdata.img isn't necessary to update. Neither is recovery.img if you want to keep a custom recovery.
Also as I mentioned before, if you have disabled encryption on your device, if you flash the stock kernel (boot.img) and boot up with it you will re-enable forced encryption. You will need to flash a kernel with force encryption disabled if you want to keep running without encryption. If you haven't disabled encryption, or don't care if your device re-encrypts (this doesn't erase anything, just may take a few minutes on first boot) then this doesn't matter.
Click to expand...
Click to collapse
Can I manually update without removing root first? Am I going to receive an error if I don't remove it? based on what you said, I will remove userdata.img and recovery.img and that will not wipe my data right? Do I have to decompress those files or the flash-all.bat will take care of that? Thanks!

saman0suke1 said:
Can I manually update without removing root first? Am I going to receive an error if I don't remove it? based on what you said, I will remove userdata.img and recovery.img and that will not wipe my data right? Do I have to decompress those files or the flash-all.bat will take care of that? Thanks!
Click to expand...
Click to collapse
I'm interested as well. Mine is rooted and I have encryption disabled, and I have TWRP on my phone. I tried to sideload the OTA update, but I can't get my phone to start sideload. I even flashed the stock recovery to get it to go, and no dice. What do I do next?

Anyone? I would appreciate the feedback, thanks!

sideload refers to adb as I understand it. thats NOT how you flash....you use fastboot to flash so you can do it all by hand or use one of the toolkits that script it for you.

cmh714 said:
sideload refers to adb as I understand it. thats NOT how you flash....you use fastboot to flash so you can do it all by hand or use one of the toolkits that script it for you.
Click to expand...
Click to collapse
Thanks, I get that, however I wanted to know if I need to remove the root before installing the update and if I need to decompress the .zip with the .img files or the batch will do that? thanks!

saman0suke1 said:
Thanks, I get that, however I wanted to know if I need to remove the root before installing the update and if I need to decompress the .zip with the .img files or the batch will do that? thanks!
Click to expand...
Click to collapse
If your doing from the PC you need to extract the zip file from within the image and then fastboot them. As for root, when you do it from fastboot I dont believe it matters as you will lose root anyway and need to re-root via flashing SuperSU.zip

Worked great! Thanks! Android 5.0.1 and root, no data deleted

Is it normal to not have received an update beyond 5.0? I have had a Nexus 6 since day one, no rooting of any kind and I have not received 5.0.1.
I have done the sideload method, but I really don't want to bother with it. I do however want some of these terrible bugs I am experiencing squashed. This phone is giving me lots of issues lately.
Thanks!

Can you receive and install OTA updates with an unlocked bootloader? Everything else is stock, no disabled encryption or anything just unlocked bootloader.

naulsballs said:
Can you receive and install OTA updates with an unlocked bootloader? Everything else is stock, no disabled encryption or anything just unlocked bootloader.
Click to expand...
Click to collapse
Yes
Sent from my Nexus 6 using XDA Free mobile app

saman0suke1 said:
Worked great! Thanks! Android 5.0.1 and root, no data deleted
Click to expand...
Click to collapse
Can you provide steps for this. I am in the same situation. I have the 5.0.1 image downloaded, just wondering what files and what order to flash. Thanks

TOCS88 said:
Is it normal to not have received an update beyond 5.0? I have had a Nexus 6 since day one, no rooting of any kind and I have not received 5.0.1.
I have done the sideload method, but I really don't want to bother with it. I do however want some of these terrible bugs I am experiencing squashed. This phone is giving me lots of issues lately.
Thanks!
Click to expand...
Click to collapse
Try pulling your Sim card out and rebooting.

scotbotmosh said:
Can you provide steps for this. I am in the same situation. I have the 5.0.1 image downloaded, just wondering what files and what order to flash. Thanks
Click to expand...
Click to collapse
If you're planning to stay rooted (meaning no OTA in future) system.img, boot.img and radio.img in any order.

scotbotmosh said:
Can you provide steps for this. I am in the same situation. I have the 5.0.1 image downloaded, just wondering what files and what order to flash. Thanks
Click to expand...
Click to collapse
If you use fastboot, just run these commands in terminal (I used windows, so in order to flash using fastboot, put the image that you downloaded for the update in the same folder where you have fastboot and open a terminal there) you can rename the .img files to whatever you like and replace those name in the commands below:
fastboot flash bootloader <bootloader file name here>.img
fastboot flash radio <radio file name here>.img
Then reboot it:
fastboot reboot-bootloader
Then flash these:
fastboot flash recovery recovery.img
fastboot flash boot boot.img
fastboot flash system system.img
And that's it. These commands are run while the phone is connected to the PC, you have to turn it on by pressing volume up + volume down + power.
Good luck.

[LOLLIPOP 5.1][STOCK] Cherry Mobile One H940 Official Links

Here're the official links for Cherry Mobile One H940:
For fastboot flashable images:
Builds Available: LBY29G, LMY47O
Download: here
For OTAs:
Build: LBY29G -> LMY47O
Android Version: 5.1 (Beta) -> 5.1 Official
Download: here
Flashing Instructions:
A. Using ADB sideload (for recovery flashable update zips):
1.) Flash stock recovery.
2.) Boot to stock recovery.
3.) Perform up + power button to show menu.
4.) Select Apply update from ADB.
5.) Install ADB drivers if on Windows and not yet installed.
6.) Open cmd prompt.
7.) Change directory to where you downloaded the update zip.
8.) Issue cmd: adb sideload <update.zip filename>
9.) Wait until completed.
10.) Select reboot.
B. Using fastboot:
1.) Boot into bootloader.
2.) Flash image using fastboot flash <partition name> <image filename>.img command.
3.) Reboot using fastboot reboot command.
C. Using DD (for flashing images like system.img):
1.) Boot into custom recovery. (you could use fastboot boot custom-recovery.img so that you don't overwrite your existing one)
2.) Push image file to /sdcard using adb push command. (you might have to mount the sdcard partition before doing this)
3.) Open an ADB command shell.
4.) Go to /sdcard.
5.) Find the system partition by issuing a cat /proc/partitions command. It should be the one sized exactly 1GB (1,024,000 shown).
6.) Use dd if=/sdcard/<image filename>.img of=/dev/block/<name of partition> .
7.) Reboot either using custom recovery or just issuing an adb reboot after exiting from ADB command shell.

do you have another working file for LMY47O system.img? i'm getting a fastboot flash fail (chunk unkown) error. thanks

Reuploading now. Might be a bad upload from my end. Will post updated hashes later for the system.img.

intersectRaven said:
Reuploading now. Might be a bad upload from my end. Will post updated hashes later for the system.img.
Click to expand...
Click to collapse
same problem here
thank you

Uploaded. If it still fails, you might have to use dd to restore. Odd that it fails now when it was fine before. :/

OTA Flashing Error
Hello. I would like to ask why I cannot flash the OTA Update for CM1. I am currently on LBY29G, rooted, unlocked bootloader and stock recovery. Thanks.

erickho0407 said:
Hello. I would like to ask why I cannot flash the OTA Update for CM1. I am currently on LBY29G, rooted, unlocked bootloader and stock recovery. Thanks.
Click to expand...
Click to collapse
Go back to stock boot. Since you're rooted, I'm assuming your boot has been modified to be insecure.

intersectRaven said:
Go back to stock boot. Since you're rooted, I'm assuming your boot has been modified to be insecure.
Click to expand...
Click to collapse
Ok By going back to "stock boot," does this mean I have to re-lock the bootloader? I believe that I have only used the ALL-IN ONE TOOL in this thread to do the 3 things mentioned above, and also installed Lucky Patcher, Greenify, Busybox (Free) and Ad-Away in relation to root access, so I am not 100% sure by what you mean. Thanks again.

erickho0407 said:
Ok By going back to "stock boot," does this mean I have to re-lock the bootloader? I believe that I have only used the ALL-IN ONE TOOL in this thread to do the 3 things mentioned above, and also installed Lucky Patcher, Greenify, Busybox (Free) and Ad-Away in relation to root access, so I am not 100% sure by what you mean. Thanks again.
Click to expand...
Click to collapse
No you don't need to relock the bootloader. You just need to flash stock boot partition. This is usually replaced when rooting.

intersectRaven said:
No you don't need to relock the bootloader. You just need to flash stock boot partition. This is usually replaced when rooting.
Click to expand...
Click to collapse
Ok. So this means that I reflash boot.img right (would probably use fastboot). Thank you very much for assistance

Sir
can you capture ota for myphone uno

gabisonfire98 said:
Sir
can you capture ota for myphone uno
Click to expand...
Click to collapse
Unfortunately, I don't have an Uno so no.

still the same problem, will try DD **update still failed, and now can't flash old build...will try to restore a backup from CWM

Working internal detect for pc and file ?

marjoejoejoe said:
still the same problem, will try DD **update still failed, and now can't flash old build...will try to restore a backup from CWM
Click to expand...
Click to collapse
I see. Very weid. Might be some form of protection now for the system partition. I'll just take it down now so that no one else uses it.

intersectRaven said:
I see. Very weid. Might be some form of protection now for the system partition. I'll just take it down now so that no one else uses it.
Click to expand...
Click to collapse
I'll have another go at it later today. Was able to flash my own backup using CWM

marjoejoejoe said:
I'll have another go at it later today. Was able to flash my own backup using CWM
Click to expand...
Click to collapse
Still, it should be foolproof. I already checked and double-checked the system image I uploaded and it's mountable in Linux so it should restore correctly like the previous LBY image. I can't think of any other reason aside from some sort of protection that would disallow flashing of the system image through both fastboot and dd.
*On second thought, I'm reupping the image. I just flashed it using dd on my device and it works perfectly.

success, was running a windows 7 virtual machine in OSX. it must have been a protection, you are right...ran it using OSX instead (stupid me, why i didn't use it in the first place for fastboot).
files are good to go thanks man

Need help in Flashing the Stock Recovery.
Hi Guys,
I need help in flashing the stock recovery.
I've used the ALL-IN-ONE TOOL to unlock my phone's bootloader, flash the PhilZ Touch Customer recovery and Root my CM1
[http://forum.xda-developers.com/cro.../tool-master-tool-unlock-bootloader-t2997696]
However I'm unsuccessful flashing the stock recovery from the ALL-IN-ONE TOOL so I can update my phone's software to Android 5.1.1.
Can I flash the stock recovery using one of the files here? If yes, can someone please teach me how.
Thanks in advance!

OTG
Hi,
Just a quick question, after flashing using this ROM, will CM One support OTG? Or do I need to root the phone first? Is there a way to add support for OTG?
Pardon me if this may not be much related to the topic.

[help] Locked bootloader, and stuck in bootloop with TWRP installed.

So I just bought a new phone and was getting ready to reset my Nexus 6 back to stock and relock the bootloader. Using Wugs toolkit I for some inexplicable reason relocked the bootloader before going stock. I got myself stuck in a boot loop but was eventually able to get into TWRP. Since I cannot unlock the bootloader without checking the box in the SW I want to flash a rom there but sdcard cannot mount in twrp and I am stuck. What should I attempt next or should I rma with Moto?

Bigsam411 said:
So I just bought a new phone and was getting ready to reset my Nexus 6 back to stock and relock the bootloader. Using Wugs toolkit I for some inexplicable reason relocked the bootloader before going stock. I got myself stuck in a boot loop but was eventually able to get into TWRP. Since I cannot unlock the bootloader without checking the box in the SW I want to flash a rom there but sdcard cannot mount in twrp and I am stuck. What should I attempt next or should I rma with Moto?
Click to expand...
Click to collapse
You must use fastboot commands.
fastboot format cache
fastboot format userdata
Then you can transfer a ROM from your PC and flash.

The_Merovingian said:
You must use fastboot commands.
fastboot format cache
fastboot format userdata
Then you can transfer a ROM from your PC and flash.
Click to expand...
Click to collapse
How can I transfer a rom to the phone? adb sideload in twrp does not seem to work and It will not mount storage.

Bigsam411 said:
How can I transfer a rom to the phone? adb sideload in twrp does not seem to work and It will not mount storage.
Click to expand...
Click to collapse
After issuing the fastboot commands I provided, MTP transfer should work.
Simply boot to TWRP after formatting from bootloader. Connect to PC, and you should see your device detected. Drag and drop the ROM in your internal storage.

Bigsam411 said:
How can I transfer a rom to the phone? adb sideload in twrp does not seem to work and It will not mount storage.
Click to expand...
Click to collapse
Should show as standard device storage like MTP. Not under adb. Should show as a drive.

The_Merovingian said:
After issuing the fastboot commands I provided, MTP transfer should work.
Simply boot to TWRP after formatting from bootloader. Connect to PC, and you should see your device detected. Drag and drop the ROM in your internal storage.
Click to expand...
Click to collapse
My phone shows up in windows Explorer but I cannot move anything over to it. I am in TWRP and cannot see the storage partition.

prdog1 said:
Should show as standard device storage like MTP. Not under adb. Should show as a drive.
Click to expand...
Click to collapse
It does show up but I am unable to transfer anything to it.

Bigsam411 said:
It does show up but I am unable to transfer anything to it.
Click to expand...
Click to collapse
Did you use the fastboot commands?

Bigsam411 said:
It does show up but I am unable to transfer anything to it.
Click to expand...
Click to collapse
Have seen this before. Try unplugging and plug back in. There is some way to access it. Never had to do it.

The_Merovingian said:
Did you use the fastboot commands?
Click to expand...
Click to collapse
I had previously tried those before opening this thread, then I tried them again just now. I attached the output from command prompt.

Ok I am now able to get to a point to where I can flash a rom and not get any errors (at least no visible ones) but I still get stuck at the boot screen with the colored dots animation. Is there a specific rom I should try to install?

Bigsam411 said:
Ok I am now able to get to a point to where I can flash a rom and not get any errors (at least no visible ones) but I still get stuck at the boot screen with the colored dots animation. Is there a specific rom I should try to install?
Click to expand...
Click to collapse
If want pure stock deodexed this is based on latest factory image. Wipe everything and flash per the OP.
http://forum.xda-developers.com/nexus-6/development/n6-shamu-lmy48i-deodexed-rooted-v1-0-08-t3176117

prdog1 said:
If want pure stock deodexed this is based on latest factory image. Wipe everything and flash per the OP.
http://forum.xda-developers.com/nexus-6/development/n6-shamu-lmy48i-deodexed-rooted-v1-0-08-t3176117
Click to expand...
Click to collapse
Thanks, I ended up finding a file that could be flashed via an adb command in twrp which let me issue the fastboot oem unlock command and I then flashed stock through twrp. I think I got it working now.

[A2017U][TWRP System Image] Stock System Image of B20 for full stock restore and OTAs

THIS APPLIES ONLY TO THE A2017U VARIANT, DO NOT USE THIS FILE ON OTHER VERSIONS
Disclaimer - don't blame me if something goes wrong
As title says, this is a full stock unmodified B20 TWRP system image. It kan be used in addition to stock boot and recovery images to restore the US A7 to conditions which will be like stock and allow to flash upcoming OTA. This was tested by @jkuczera here http://forum.xda-developers.com/showthread.php?t=3459107
Link to system image
https://cloud.swehes.com/index.php/s/31V7GgihohBCdfy
If you are BL unlocked, you will need to lock it before flashing old recovery and boot (this may not be necessary to get MR2 to flash, depending on what it checks, but the phone might not boot, unknown). This will make your phone verify boot, recovery and /system again, so flash TWRP from tenfar's thread to be able boot after relocking since his is signed
To restore, unzip the file above to TWRP folder on the SD Card, then in TWRP under mount points unmount /system and put check mark on mount system as read-only. The read-only part is important so that TWRP does not modify the /system apon exit. You can then restore boot, recovery and system image.
Another partition, fastboot, was altered if you applied B20_boot, but so far no OTA has check it so it should be fine as is. Chance is it will be just overwritten by next OTA, but in case that changes, info will be added. This step is more risky since it involves using dd command and has to be applied carefully.
EDIT: looks like @Unjustified Dev posted new build that will flash fastboot image http://forum.xda-developers.com/showpost.php?p=68677272&postcount=133
You should then boot to stock recovery and factory wipe
In case you did not dump your boot and recovery, they can be found in @rczrider's post here
http://forum.xda-developers.com/axon-7/development/untouched-b20-boot-recovery-files-t3443818
Thanks to @swehes for providing the space on his cloud for this file, @rczrider for rest of the files and @jkuczera for trying this all out

So you need TWRP for this, but will this overwrite the TWRP recovery and make it truly stock?

imp3r10 said:
So you need TWRP for this, but will this overwrite the TWRP recovery and make it truly stock?
Click to expand...
Click to collapse
Indeed and before rebooting , you MUST Wipe Data + Internal Storage, cuz you are flashing new boot and system and will get in conflicts if there no wipe.

Just for clarity sake these are the steps I need to take to get back to B20 from B20_Boot?
1. fastboot oem lock
2. put system image from OP's post AND stock_boot_backup.img AND stock_recovery_backup.img from rczrider's post into TWRP folder.
3. in TWRP unmount /system and check mark on mount system as read only.
4. Flash boot, recovery, and system image.
5. Wipe Data and Internal Storage.
6. Profit?

runderekrun said:
Just for clarity sake these are the steps I need to take to get back to B20 from B20_Boot?
1. fastboot oem lock
2. put system image from OP's post AND stock_boot_backup.img AND stock_recovery_backup.img from rczrider's post into TWRP folder.
3. in TWRP unmount /system and check mark on mount system as read only.
4. Flash boot, recovery, and system image.
5. Wipe Data and Internal Storage.
6. Profit?
Click to expand...
Click to collapse
Pretty much. I would reboot to stock recovery after and factory wipe from there. you might wan't to flash fastboot from B20 OTA for extra profit but seems like it's a moot point so far if you have seen the Unjustified Devs trick for BL unlock via TWRP

peramikic said:
Pretty much. I would reboot to stock recovery after and factory wipe from there. you might wan't to flash fastboot from B20 OTA for extra profit but seems like it's a moot point so far if you have seen the Unjustified Devs trick for BL unlock via TWRP
Click to expand...
Click to collapse
Thanks.
I'm having to do a warranty replacement on my device so i'll probably want to do the fastboot flash. Any idea where to get a fastboot image?

runderekrun said:
I'm having to do a warranty replacement on my device so i'll probably want to do the fastboot flash. Any idea where to get a fastboot image?
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Click to collapse
Step 6 to pull your own: http://forum.xda-developers.com/axon-7/how-to/guide-how-to-unlock-bootloader-stay-t3461165
Or you can download the one I pulled from my device (it can be found in the Mega folder linked in the OP): http://forum.xda-developers.com/axon-7/development/untouched-b20-boot-recovery-files-t3443818

And as option 3 it's inside the B18toB20 OTA file floating somewhere around here

Alright I tried this and something went wrong.
First thing I did was copy all the files where they needed to be. Then I booted into fastboot and did a "fastboot oem lock".
Then my device would do nothing. I would boot up to the ZTE logo then go black a second later. I tried to force into recovery by selecting recovery in fastboot but same thing, ZTE logo then blackness.
I got it back by getting into fastboot and performing a "fastboot oem unlock" again. All it did was wipe data.
What did I do wrong? I thought I am supposed to lock bootloader first before I restore system and flash recover and boot????

runderekrun said:
Alright I tried this and something went wrong.
First thing I did was copy all the files where they needed to be. Then I booted into fastboot and did a "fastboot oem lock".
Then my device would do nothing. I would boot up to the ZTE logo then go black a second later. I tried to force into recovery by selecting recovery in fastboot but same thing, ZTE logo then blackness.
I got it back by getting into fastboot and performing a "fastboot oem unlock" again. All it did was wipe data.
What did I do wrong? I thought I am supposed to lock bootloader first before I restore system and flash recover and boot????
Click to expand...
Click to collapse
Ok so if you modified boot, system or recovery in anyway then after BL lock it will not boot since it will fail secure boot, so you need to load the signed TWRP from tenfar's thread via EDL after locking. That will let you run TWRP with locked BL. Although ig you just want stock for upcoming OTA, then you might be good staying unlocked. If for return, then you should lock it

peramikic said:
Ok so if you modified boot, system or recovery in anyway then after BL lock it will not boot since it will fail secure boot, so you need to load the signed TWRP from tenfar's thread via EDL after locking. That will let you run TWRP with locked BL. Although ig you just want stock for upcoming OTA, then you might be good staying unlocked. If for return, then you should lock it
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I apologize if I am fundamentaly not understanding this but wouldn't it be easier to flash system, boot, recovery, and fastboot back to stock via my current twrp THEN relock bootloader?

runderekrun said:
I apologize if I am fundamentaly not understanding this but wouldn't it be easier to flash system, boot, recovery, and fastboot back to stock via my current twrp THEN relock bootloader?
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Click to collapse
Yeah, now that we know fastboot will work even on stock boot that will work as well. The only thing you won't be able to do is flash back the B20 fastboot image that way, but enough to pass OTA most likely. The long way you can revert the fastboot image as well. I only wanted to post the image to begin with, but then wrote out instruction as they rolled around in my head. This will change soon anyways so a proper write-up will happen, just not by me, Documentation was never my forte

My BL is unlocked from ZTE right now, If I want to get CM for future but also want upcoming update from ZTE? What are the exact steps that I need to follow to get future OTA but also keep the BL unlocked for future CM? Please help as I'm confused with all these instructions.

peramikic said:
THIS APPLIES ONLY TO THE A2017U VARIANT, DO NOT USE THIS FILE ON OTHER VERSIONS
Disclaimer - don't blame me if something goes wrong
As title says, this is a full stock unmodified B20 TWRP system image. It kan be used in addition to stock boot and recovery images to restore the US A7 to conditions which will be like stock and allow to flash upcoming OTA. This was tested by @jkuczera here http://forum.xda-developers.com/showthread.php?t=3459107
Link to system image
https://cloud.swehes.com/index.php/s/31V7GgihohBCdfy
If you are BL unlocked, you will need to lock it before flashing old recovery and boot (this may not be necessary to get MR2 to flash, depending on what it checks, but the phone might not boot, unknown). This will make your phone verify boot, recovery and /system again, so flash TWRP from tenfar's thread to be able boot after relocking since his is signed
To restore, unzip the file above to TWRP folder on the SD Card, then in TWRP under mount points unmount /system and put check mark on mount system as read-only. The read-only part is important so that TWRP does not modify the /system apon exit. You can then restore boot, recovery and system image.
Another partition, fastboot, was altered if you applied B20_boot, but so far no OTA has check it so it should be fine as is. Chance is it will be just overwritten by next OTA, but in case that changes, info will be added. This step is more risky since it involves using dd command and has to be applied carefully.
EDIT: looks like @Unjustified Dev posted new build that will flash fastboot image http://forum.xda-developers.com/showpost.php?p=68677272&postcount=133
You should then boot to stock recovery and factory wipe
In case you did not dump your boot and recovery, they can be found in @rczrider's post here
http://forum.xda-developers.com/axon-7/development/untouched-b20-boot-recovery-files-t3443818
Thanks to @swehes for providing the space on his cloud for this file, @rczrider for rest of the files and @jkuczera for trying this all out
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Click to collapse
Can someone please explain exactly how to do this. I have an unofficial twrp on my phone and the bootloader is unlocked but after i tried to flash super su it got stuck on bootloop so I wiped every thing and I also accidentally wiped my os too. So now I don't have an os and I want to go back to stock. Can someone please explain step by step on how to fix this? I just got the phone.

seby1234 said:
Can someone please explain exactly how to do this. I have an unofficial twrp on my phone and the bootloader is unlocked but after i tried to flash super su it got stuck on bootloop so I wiped every thing and I also accidentally wiped my os too. So now I don't have an os and I want to go back to stock. Can someone please explain step by step on how to fix this? I just got the phone.
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Click to collapse
All right I'm no expert either but I'll try to make this as straightforward as possible.
1) Format your SD card as exFAT. This is important as otherwise you will not be able to transfer the system image to your SD card since it is 6GB. To do this you can just plug it in to your PC, right click, Format and then select exFAT from the dropdown.
2) Download tenfar's tool for B20, rczrider's boot and recovery backup, and the system image backup from the link in the OP.
3) Create a new folder in /external_sd/TWRP/BACKUPS/serial_number/.Move the stock_boot_backup and stock_recovery backup into the folder.
4) Using a program such as 7zip, extract the 6GB system image file and move it to the same folder.
6) Go to into fastboot mode. Before you do anything you have to relock the bootloader otherwise the system will be modified and you want to be 100? stock. Execute 'fastboot oem lock'. You should then boot to a black screen.
7) Unzip tenfar's tool. Go to the unzipped folder, then hold down shift+right click and select 'Open command window here'. Execute 'axon7root.exe -p [COMPORT #] -r. To figure out your com port #, go to Device Manager, then go to down to where it says "Qualcomm Loader..." and your com port number is the number at the end. So for example if your com port number is 5, you should execute axon7root.exe -p 5 -r. Allow the program to do its thing.
5) Boot into TWRP. Do not swipe to allow modifications. Once in TWRP, go to "Install", "Install Image" at the bottom right hand corner, and then navigate to the stock_recovery_backup in the folder that you moved it to to. Select it and then choose the Recovery partition to flash it to. Do the same thing for stock_boot_backup.
6) Once you have flashed boot and recovery, go to the main menu, then "Restore" and then Restore the system image backup.
7) Go to wipe and then slide to factory reset. Finally, reboot system.
Hope that helps! If you have any questions, feel free to ask me.
rczrider's stock boot and recovery thread
http://forum.xda-developers.com/axon-7/development/untouched-b20-boot-recovery-files-t3443818/page7
tenfar's tool thread: http://forum.xda-developers.com/axo...xon-7-root-bootloader-unlokced-t3441204/page1

Has anyone who requested the bootloader unlock from ZTE (and mistakenly installed it) returned to stock and been able to get OTA's? I followed this guide and seemed to have returned to stock fine but the only OTA I can get now is the bootloader unlock OTA. I've downloaded and discarded it several times but that is the only one I can get. Anyone know of a way to bypass this OTA and get the new MR2 that was just released? I want to get OTA's until the custom roms start flowing.
Thanks!

shifuharris said:
Has anyone who requested the bootloader unlock from ZTE (and mistakenly installed it) returned to stock and been able to get OTA's? I followed this guide and seemed to have returned to stock fine but the only OTA I can get now is the bootloader unlock OTA. I've downloaded and discarded it several times but that is the only one I can get. Anyone know of a way to bypass this OTA and get the new MR2 that was just released? I want to get OTA's until the custom roms start flowing.
Thanks!
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Click to collapse
From what I can tell, once you apply for official bootloader unlock, your IMEI is placed on a list that will not get any future OTA updates set to it.
However, the OTA for B20 to B27 has been uploaded here: https://mega.nz/#F!kYtRAJjJ!5tD1zPpo0nw2tJwhANA9pQ
Try flashing that via stock recovery.

Quick question for anyone who might know.
The Link to system image which is : https://cloud.swehes.com/index.php/s/31V7GgihohBCdfy has the following;
1. system_image.emmc.win
2. system_image.emmc.win.md5
Am I suppose to rename system_image.emmc.win to system_image.emmc.img and load?
it's not as clear that's why I ask but I ended up downloading rczrider system.img and reflashed via TWRP since I was a bit confused.
Thanks!
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I simply just went into TWRP backed up by boot so it would create a directory that contains the info I needed copied the system_image.emmc.win and system_image.emmc.win.md5 and restored.

xtermmin said:
From what I can tell, once you apply for official bootloader unlock, your IMEI is placed on a list that will not get any future OTA updates set to it.
However, the OTA for B20 to B27 has been uploaded here: https://mega.nz/#F!kYtRAJjJ!5tD1zPpo0nw2tJwhANA9pQ
Try flashing that via stock recovery.
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Click to collapse
I suspected as much. I downloaded the update and tried to flash it via the stock recovery using the update for ADB option but it fails saying that the package is not a ks package. Booooo. I really wanted this MR becasue they addressed the weak cell signal which I think contributes significantly to my battery drain. Not sure if there are any alternatives to get the update installed. Not very a happy about the ceased OTA's due to the bootloader unlock. Thinking the new Nexus (or whatever they are going to call them) is looking pretty good at the moment.

shifuharris said:
I suspected as much. I downloaded the update and tried to flash it via the stock recovery using the update for ADB option but it fails saying that the package is not a ks package. Booooo. I really wanted this MR becasue they addressed the weak cell signal which I think contributes significantly to my battery drain. Not sure if there are any alternatives to get the update installed. Not very a happy about the ceased OTA's due to the bootloader unlock. Thinking the new Nexus (or whatever they are going to call them) is looking pretty good at the moment.
Click to expand...
Click to collapse
Try the microSD card method instead.
First, make sure OEM Unlocking is checked in developer settings, rename the OTA to "update.zip", put on microSD, boot into stock recovery, and choose update from microSD.