Database Users

Please help! ZTE Axon 7 won't boot after deleting Lineage and TRWP

Hi,
don't know if this problem has already occurred before.
I had lineage and TRWP installed on my Axon 7 (EU version) and wanted to go back to the stock a2017g.
Therefore I deleted the ROM and wiped everything with TWRP.
Then I deleted TWRP and now i'm stuck at the the bootloader (which is unlocked), but TWRP seems to be gone.
The main problem is, whenever I try to flash a new stock rom (via recovery), I get the error "signature verification failed" and the process is aborted with no change to the system whatsoever.
Is there anything I can do at this point or is my phone practically dead?
Thanks in advance for any help.

tempest89 said:
Hi,
don't know if this problem has already occurred before.
I had lineage and TRWP installed on my Axon 7 (EU version) and wanted to go back to the stock a2017g.
Therefore I deleted the ROM and wiped everything with TWRP.
Then I deleted TWRP and now i'm stuck at the the bootloader (which is unlocked), but TWRP seems to be gone.
The main problem is, whenever I try to flash a new stock rom (via recovery), I get the error "signature verification failed" and the process is aborted with no change to the system whatsoever.
Is there anything I can do at this point or is my phone practically dead?
Thanks in advance for any help.
Click to expand...
Click to collapse
Try to boot into bootloader interface, and issue command "fastboot flash recovery TWRP.img" on your computer( the current working directory should contain the TWRP.img file) . If your bootloader is unlocked, you should see no error of this command. Then press up/down button to select recovery mode. You should see the familiar TWRP again. Good luck!

tempest89 said:
Hi,
don't know if this problem has already occurred before.
I had lineage and TRWP installed on my Axon 7 (EU version) and wanted to go back to the stock a2017g.
Therefore I deleted the ROM and wiped everything with TWRP.
Then I deleted TWRP and now i'm stuck at the the bootloader (which is unlocked), but TWRP seems to be gone.
The main problem is, whenever I try to flash a new stock rom (via recovery), I get the error "signature verification failed" and the process is aborted with no change to the system whatsoever.
Is there anything I can do at this point or is my phone practically dead?
Thanks in advance for any help.
Click to expand...
Click to collapse
Did you try flashing an official full zip, like B10? That's another thing you can try, since you're going to lose TWRP after you flash a stock rom anyways

If you dont have recovery, flash it from edl mode, you can flash twrp or stock.
Once you install it, performa a full wipe from stock recovery, and flash a full zip.
I have similar problems, I dont loose recovery, but stock dont boot after coming back from aosp, a factory reset did the job. I think is because different filesystems in data partition

Choose an username... said:
Did you try flashing an official full zip, like B10? That's another thing you can try, since you're going to lose TWRP after you flash a stock rom anyways
Click to expand...
Click to collapse
Hi, the B10 ROM from the ZTE homepage did the trick.
Worked out nicely.
Thank you so much.
One final question remains for myself: How can I relock the bootloader (so that the 5 second screen won't show up at the start).
Tried different ways with adb and fastload, but nothing seemed to have an effect here.
So what to do?
Thank you again for your help.

tempest89 said:
Hi, the B10 ROM from the ZTE homepage did the trick.
Worked out nicely.
Thank you so much.
One final question remains for myself: How can I relock the bootloader (so that the 5 second screen won't show up at the start).
Tried different ways with adb and fastload, but nothing seemed to have an effect here.
So what to do?
Thank you again for your help.
Click to expand...
Click to collapse
you shouldn't. Fastboot should do the trick, by doing fastboot oem lock, but many people reported bricking and bad stuff...
Actually that screen comes very handy in case of a brick or if you want to enter a specific mode.l, you just select the mode and voila
Do you have fastboot? I don't know if B10 still has it, but 7.0 hasn't got it

Choose an username... said:
you shouldn't. Fastboot should do the trick, by doing fastboot oem lock, but many people reported bricking and bad stuff...
Actually that screen comes very handy in case of a brick or if you want to enter a specific mode.l, you just select the mode and voila
Do you have fastboot? I don't know if B10 still has it, but 7.0 hasn't got it
Click to expand...
Click to collapse
Hi,
I tried adb and fastboot via pc and with the axon toolkit.
The adb worked fine, but no sign of effect by the fastboot commands.
So I guess I don't have it.
Is there any other solution to at least bypass the 5 second screen?
Thanks

tempest89 said:
Hi,
I tried adb and fastboot via pc and with the axon toolkit.
The adb worked fine, but no sign of effect by the fastboot commands.
So I guess I don't have it.
Is there any other solution to at least bypass the 5 second screen?
Thanks
Click to expand...
Click to collapse
Lol fastboot is not something like EDL, it looks similar to the 5 sec screen...
When you get the 5 sec screen, use the vol keys and pwr to get to the Fastboot option and enter - it should reboot and get to fastboot after some time
You should look up what fastboot, EDL, ADB and DFU are before doing all this stuff - you can mess up badly, and by not knowing you're complicating everything - my explanation and your understanding

Phone bricked, Recovery Tool not working, bootloader stuck locked, help???

Hi guys...
So my OnePlus 2 was having some issues yesterday, and I flashed the stock ROM. This was completely fine and dandy, but I also wanted to put the stock recovery on it. I made sure OEM unlocking was on, went into fastboot, and typed in "fastboot oem unlock" like normal. It finished in like a tenth of a second which I thought was a little strange. The phone rebooted and I put it back into fastboot. I tried to flash the recovery and it said (remote device is locked. Cannot flash images). So at this point I was frustrated. I went into TWRP and installed the SuperSU binary. Then, I went to the Play Store, downloaded Flashify, and flashed the recovery onto my phone. I restarted my phone.... and bam. Recovery wouldn't work anymore. And then when I tried to boot into normal Android it still wouldn't work, just stuck on the OnePlus and Android screen, as if there was no /system/ partition. I can still get it into Fastboot, and I put it in EDL mode and installed the Qualcomm 9008 driver, and flashed OxygenOS 3.0.2 through the MSM downloader from https://forums.oneplus.net/threads/updated-28-06-2016-mega-unbrick-guide-for-a-hard-bricked-oneplus-2.347607/ and the MSM downloader just gave me an error that, in garbage text, said something about Sahara and Firehouse or something like that. I did get it to go successfully by downloading a different recovery package (I believe it was Color OS 2.0) but I have a ONE A2005 and I belive that was meant for ONE A2001 and it caused my phone to constantly flash rapidly at the Oneplus and Android screen (it would start to boot then immediately shut off). Fastboot still works but it still says the bootloader is locked so I can't really do anything. Any help would be much appreciated!
Jack

Update: I finally got Recovery to work. However, it still gets stuck on the OnePlus & Android screen, even after sideloading a stock ROM and installing it via the stock recovery. I fear my boot.img is corrupted. Does anyone happen to know where I can find a stock ROM that comes with recovery.img, boot.img, system.img, et cetera?

Actually, nevermind. It says oem unlock is disabled, and I can't even get into the OS to enable it.

superblox02 said:
Actually, nevermind. It says oem unlock is disabled, and I can't even get into the OS to enable it.
Click to expand...
Click to collapse
You should be able to unlock it in fastboot or adb
OEM unlock or something like that
Check this thread https://forums.oneplus.net/threads/...wrp-root-nandroid-efs-backup-and-more.345478/

Can anyone help me fix my Axon 7.

I tried to unlock my phone (A2017G) and flash lineage OS today following Controllerboys guide, but must have done something wrong, I managed to unlock it and flash the bootstack, but I hit an error when trying to flash LOS and so decided to reboot the system and try again, however when rebooting the system I got the error "Your device software can't be checked for corruption, Please lock the bootloader". And I cant seem to access TWRP anymore just the stock recovery.
Is there a way that I can just flash stock OS and be able to use my phone?

King Norman said:
I tried to unlock my phone (A2017G) and flash lineage OS today following Controllerboys guide, but must have done something wrong, I managed to unlock it and flash the bootstack, but I hit an error when trying to flash LOS and so decided to reboot the system and try again, however when rebooting the system I got the error "Your device software can't be checked for corruption, Please lock the bootloader". And I cant seem to access TWRP anymore just the stock recovery.
Is there a way that I can just flash stock OS and be able to use my phone?
Click to expand...
Click to collapse
That's not an error message, it's the unlocked bootlaoder screen. get used to it, you're gonna see it every time you reboot
You probably didn't flash the Universal Bootloader. You didn't even read. You should install TWRP again with axon7tool, then get there and flash the Universal Bootloader, then the A2017G modem, the the ROM. If that doesn't work just download MiFlash and the latest G package and flash it

Hard/soft brick

I think I messed up my PH-1 something royally.
All I was trying to do is unlock my bootloader and load Magisk.
To preface this, my PH-1 seemed to act a little wonky from the get-go. I bought it 3rd person from a guy on craigslist so anything warranty involved I think I'm out of luck.
The phone would take a while to power on, it took something like 10secs on the power button just to turn it on. And if I set it to reboot , it boots into the bootloader. Also, I was never able to access the recovery (even using power + up). It always felt like I had to hold the buttons for way to long to get to its destination; e.g. up and power to get into fastboot.
Ok where I'm at now. In can occasionally get into fastboot mostly after it bootlooping a few times. It won't get past the Essential logo if I try to boot it up.
PS I was able to unlock the bootloader.
Steps I took to remedy this:
> erase all user data in fastboot
> hold power + u + d to hard power off
> follow this guide https://forum.xda-developers.com/essential-phone/how-to/guide-rooting-essential-ph-1-magisk-t3701976
> attempt to install stock system image via flash-all
>a ton other
Here are the results of that.
https://imgur.com/a/iVwwS
Help me guys please. :crying:
A little progress, I was unable to unlock_critical but its still hanging here
https://imgur.com/a/IdZum

jAm-0 said:
I think I messed up my PH-1 something royally.
All I was trying to do is unlock my bootloader and load Magisk.
To preface this, my PH-1 seemed to act a little wonky from the get-go. I bought it 3rd person from a guy on craigslist so anything warranty involved I think I'm out of luck.
The phone would take a while to power on, it took something like 10secs on the power button just to turn it on. And if I set it to reboot , it boots into the bootloader. Also, I was never able to access the recovery (even using power + up). It always felt like I had to hold the buttons for way to long to get to its destination; e.g. up and power to get into fastboot.
Ok where I'm at now. In can occasionally get into fastboot mostly after it bootlooping a few times. It won't get past the Essential logo if I try to boot it up.
PS I was able to unlock the bootloader.
Steps I took to remedy this:
> erase all user data in fastboot
> hold power + u + d to hard power off
> follow this guide https://forum.xda-developers.com/essential-phone/how-to/guide-rooting-essential-ph-1-magisk-t3701976
> attempt to install stock system image via flash-all
>a ton other
Here are the results of that.
https://imgur.com/a/iVwwS
Help me guys please. :crying:
Click to expand...
Click to collapse
read through this and follow the steps should be good to go.
https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681
This is also very helpful
https://mata.readthedocs.io/en/latest/

That's the exact process I was going through, and it finally booted up.
The issue I was having was a bad usb connection which wouldn't allow me to unlock_critical.
SOLVED. Still no Magisk, we'll worry about that another time. 5hrs of troubleshooting is enough for one night.

https://imgur.com/a/ZiBzp
SO close to getting Magisk to install, any reason the refuses to flash the boot partition? I used the stock boot.img and had Magisk patch it before I flashed

SO close to getting Magisk to install, any reason the refuses to flash the boot partition? I used the stock boot.img and had Magisk patch it before I flashed

jAm-0 said:
SO close to getting Magisk to install, any reason the refuses to flash the boot partition? I used the stock boot.img and had Magisk patch it before I flashed
Click to expand...
Click to collapse
You have to flash magisk in twrp recovery NOT bootloader mode.
It's right in the OP from the rooting guide you followed:
Do not set up a password if you are on 8.1 twrp doesn't work.
You need to read through that rooting guide and make sure you know what you're doing before you try.
This phone is easy to hard brick and there is no solution to recover from that.
OREO 8.0/8.1
REQUIREMENTS:
An unlocked bootloader.
A working ADB/Fastboot environment on your computer. Knowledge on how ADB and Fastboot works is also preferred.
The stock boot image for whatever build you're running/trying to root.
The latest TWRP build for our device.
If on 8.1, remove your pin/pattern/passcode until the root process is done.
1. Download both the stock boot image for whatever build you're running and the Magisk or SuperSU zip. Transfer both files to your device's internal storage.
2. Reboot your phone into the bootloader, then open up your command prompt or terminal and flash the latest TWRP build for the device using:
Code:
fastboot flash boot twrp.img
3. Once TWRP has finished flashing, reboot into your recovery. When prompted, enter your pattern/passcode/password to decrypt your data in order to gain access to your internal storage.
4. Once you're in TWRP, install the stock boot image and then the Magisk/SuperSU zip.
5. Whenever Magisk/SuperSU finishes installing, simply reboot your device! You should now be rooted.
*NOTE: TWRP will NOT remain installed on your device.

wolfu11 said:
You have to flash magisk in twrp recovery NOT bootloader mode.
It's right in the OP from the rooting guide you followed:
Do not set up a password if you are on 8.1 twrp doesn't work.
You need to read through that rooting guide and make sure you know what you're doing before you try.
This phone is easy to hard brick and there is no solution to recover from that.
OREO 8.0/8.1
REQUIREMENTS:
An unlocked bootloader.
A working ADB/Fastboot environment on your computer. Knowledge on how ADB and Fastboot works is also preferred.
The stock boot image for whatever build you're running/trying to root.
The latest TWRP build for our device.
If on 8.1, remove your pin/pattern/passcode until the root process is done.
1. Download both the stock boot image for whatever build you're running and the Magisk or SuperSU zip. Transfer both files to your device's internal storage.
2. Reboot your phone into the bootloader, then open up your command prompt or terminal and flash the latest TWRP build for the device using:
Code:
fastboot flash boot twrp.img
3. Once TWRP has finished flashing, reboot into your recovery. When prompted, enter your pattern/passcode/password to decrypt your data in order to gain access to your internal storage.
4. Once you're in TWRP, install the stock boot image and then the Magisk/SuperSU zip.
5. Whenever Magisk/SuperSU finishes installing, simply reboot your device! You should now be rooted.
*NOTE: TWRP will NOT remain installed on your device.
Click to expand...
Click to collapse
I realize all that, the issue is I cannot access any sort of recovery because I think my bootloader is defective.
For example from a cold restart if I press the power button for say 3 -5 seconds it wont boot, just boot to the Essential logo and loop. To get the phone to boot I have to hold the power down for 15-20 seconds while it bootloops a couple times then it'll boot.
Is there a possible way to reflash the bootloader software if it is defective? It's unlocked btw
There is a way to install magisk via fastboot with a patched_boot img which I'm working on. Cant seem to find the right boot img to patch for 8.1
PS Is it possible to flash .zips through fastboot? e.g. custom roms etc

Was finally able to get into recovery, so all is well. Thanks for the help yall

OP, what was your process to successfully get into recovery and fix your problems?
It may help others sometime?

gimpy1 said:
OP, what was your process to successfully get into recovery and fix your problems?
It may help others sometime?
Click to expand...
Click to collapse
It's really hard to say, my phone has a serious problem with it. sometimes I cant get it to boot, it will boot into the bootloader over and over and over. I've managed to get Lineage 15.1 on if for a bit until I tried to get back into the recovery which sent it manic.
I just got lucky I was able to get into TWRP and flash lineage.
my first issue not being able to flash the stock image via fastboot because I didn't unlock_critical which can sometimes fail when the usb connection is bad.
Currently flashing stock again if my phone will boot up. I'm not sure whats wrong with my bootloader but its causing a ton of havoc

My essential phone stuck in boot logo,bootloader work but recovery doesn´t work
Bootloader locked.
Oem unlocking disable.
Usb debugging disable.
How to flash stock recovery or twrp on bootloader locked ? please
Thank you!

katastyle971 said:
My essential phone stuck in boot logo,bootloader work but recovery doesn´t work
Bootloader locked.
Oem unlocking disable.
Usb debugging disable.
How to flash stock recovery or twrp on bootloader locked ? please
Thank you!
Click to expand...
Click to collapse
Same boat for me - just keep rebooting to show Powered by Android Screen and then reboot again and again. Was able to see my device using fastboot devices command but all attempts to access recory just repeat the bootloop entry. I would happily check the OEM UNLOCK option in dev settings but can't even get it to book to any OS to make that option happen. Still shows bootloader locked on bootloader screen - any help someone can suggest?

I had this problem tonight also. In my case I suspect it had to do with the install of magisk in which I checked both boxes and patched the bootloader. on reboot I was stuck on boot. Just wanted to add my solution. I got the pie back to stock zip here https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681 then I put it into the adb folder and ran the flashall.bat script. I tried the no wipe one and it saved my information. very happy I didnt have to resetup my phone in the end.

katastyle971 said:
My essential phone stuck in boot logo,bootloader work but recovery doesn´t work
Bootloader locked.
Oem unlocking disable.
Usb debugging disable.
How to flash stock recovery or twrp on bootloader locked ? please
Thank you!
Click to expand...
Click to collapse
I am in the same boat. I tried to re-install the OS, but because my USB debugging was not enabled, Fastboot worked but ADB would not and since I basically wiped the recovery area, my phone will only boot into Fastboot but will not allow any loading of recovery. I would pay for someone to help. This is so hard to figure out. I have contacted Essential but since my phone is over 12 months old, the warranty has expired.
Help please. It seems like such a waste to have a bricked phone.

Can't lock bootloader because I can't get into fastboot.

Hello, I've recently been stumped. Last night I attempted to install Lineage OS on my Axon 7 A2017U. I used Axon7Toolkit to unlock the bootloader and install TWRP. This was the first I've seen of the warning from google telling me to lock my bootloader. (My Motorola Nexus 6 never did this) So I ignored it until I had Lineage installed and when I tried to boot, the system was encrypted with a password. The internet said there is no password. I just have to wipe in TWRP. So I tried that to no avail. At that point I said screw this. I'm gonna go back to stock before I mess anything up. Flashed stock using MiFlash. Everything is good and dandy except that aforementioned warning message when booting. No matter what I try, I can't get into fastboot to lock the bootloader. Every time I try, it shows that message and boots normally. I've tried using "adb reboot bootloader" it went to the message and boots to OS. I tried holding power and volume up then selecting bootloader. Same result. I tried holding power and volume up then selecting recovery (this is when I realized TWRP was gone. It must have been overwritten when flashing stock firmware) and then reboot to bootloader. Same result. I really don't know what else to try. I guess I could ignore it, but that's really not what I'm looking for.

ScottDemon said:
Hello, I've recently been stumped. Last night I attempted to install Lineage OS on my Axon 7 A2017U. I used Axon7Toolkit to unlock the bootloader and install TWRP. This was the first I've seen of the warning from google telling me to lock my bootloader. (My Motorola Nexus 6 never did this) So I ignored it until I had Lineage installed and when I tried to boot, the system was encrypted with a password. The internet said there is no password. I just have to wipe in TWRP. So I tried that to no avail. At that point I said screw this. I'm gonna go back to stock before I mess anything up. Flashed stock using MiFlash. Everything is good and dandy except that aforementioned warning message when booting. No matter what I try, I can't get into fastboot to lock the bootloader. Every time I try, it shows that message and boots normally. I've tried using "adb reboot bootloader" it went to the message and boots to OS. I tried holding power and volume up then selecting bootloader. Same result. I tried holding power and volume up then selecting recovery (this is when I realized TWRP was gone. It must have been overwritten when flashing stock firmware) and then reboot to bootloader. Same result. I really don't know what else to try. I guess I could ignore it, but that's really not what I'm looking for.
Click to expand...
Click to collapse
The sticky edl thread has stock b15 with fastboot. Make sure to fully wipe and have stock recovery before attempting to relock.
Sent from my ZTE Axon 7 using Tapatalk

ScottDemon said:
Hello, I've recently been stumped. Last night I attempted to install Lineage OS on my Axon 7 A2017U. I used Axon7Toolkit to unlock the bootloader and install TWRP. This was the first I've seen of the warning from google telling me to lock my bootloader. (My Motorola Nexus 6 never did this) So I ignored it until I had Lineage installed and when I tried to boot, the system was encrypted with a password. The internet said there is no password. I just have to wipe in TWRP. So I tried that to no avail. At that point I said screw this. I'm gonna go back to stock before I mess anything up. Flashed stock using MiFlash. Everything is good and dandy except that aforementioned warning message when booting. No matter what I try, I can't get into fastboot to lock the bootloader. Every time I try, it shows that message and boots normally. I've tried using "adb reboot bootloader" it went to the message and boots to OS. I tried holding power and volume up then selecting bootloader. Same result. I tried holding power and volume up then selecting recovery (this is when I realized TWRP was gone. It must have been overwritten when flashing stock firmware) and then reboot to bootloader. Same result. I really don't know what else to try. I guess I could ignore it, but that's really not what I'm looking for.
Click to expand...
Click to collapse
No, you don't have to WIPE in TWRP, you have to FORMAT DATA! It does roughly the same thing (you lose all your data and internal storage) but since the internal partition is encrypted, it de-encrypts it. To avoid having to lose the internal storage again you just have to flash Magisk or SuperSU right after flashing the ROM (before booting for the first time) and you'll be able to change ROMs with no problem. (but flash magisk right after changing the rom too, of course).
The unlocked bootloader disclaimer is completely normal, however if you're annoyed by it you can get rid of it by following Raystef66's guide called "remove unlocked bootloader inscription".
Happy flashing. Knowing all that, you can go back to Lineage or sth again. Just remember this: If you have access to EDL mode you can get out of the nastiest of bricks. And the A2017U defaults to EDL if there's something seriously wrong. So the U os basically unbrickable
p.s.: NFound's AEX bootloader comes premade so that you won't have the unlocked bootloader inscription. But you have to use one of the Oreo ROMs.
p.p.s.: You can reinstall fastboot and lock but it's just a very bad decision. Just ask if you ever have that sort of trouble, at least I will see it and reply