boot loop, only fastboot works, bootloader locked - Asus Zenfone 5Z Questions & Answers

Hello Guys,
I have problem with my Zenphone5.
The phone restarts after the asus log. Recovery mode does not load. You can only work with the phone in fast mode using adb fastboot. Unfortunately, I have a locked bootloader and can't flash twrp recovery. Is there any way to unlock the bootloader so that it can be flashed?
Thanks a lot for help!

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[Q] Bootloader locked and phone flashed

hello,
I wanted to install on my 12 cyanogen lt18. My bootloader was unlockable.
I asked with my sony imei unlock code for and then I made handling with fastboot. Fastboot said he had succeeded.
Then I erased everything (erase system bootloader userspace), and do fastboot boot boot.img to install the cyanogen kernel and recovery.
Once the fastboot boot command is launched and successful, the phone switches off. Can't access to recovery.
I installed S1TOOL and it says my bootloader is not unlocked. What can i do?
Thanks for you help
foxvengeor said:
hello,
I wanted to install on my 12 cyanogen lt18. My bootloader was unlockable.
I asked with my sony imei unlock code for and then I made handling with fastboot. Fastboot said he had succeeded.
Then I erased everything (erase system bootloader userspace), and do fastboot boot boot.img to install the cyanogen kernel and recovery.
Once the fastboot boot command is launched and successful, the phone switches off. Can't access to recovery.
I installed S1TOOL and it says my bootloader is not unlocked. What can i do?
Thanks for you help
Click to expand...
Click to collapse
If your PC can detect the phone, then try repairing firmware through PC Companion.
If not, then try flashing stock firmware (ftf) through flashtool.
Regards,
hitman-xda
New try :
I saw "legacy xperia" on the screen. I think that means that my bootloader was well unlocked. Except that then it shows me the image of the empty battery and the phone turns off. The battery is charged ...
12.1 recovery don't work but freexperia clockworld recovery is ok...
No issue to boot the cyanogen 11 recovery too.
But can't with 12.1. I think its a cyanogen issue.

Cannot flash and boot into TWRP on my Zenfone 2

Hi,
I'm trying to flash TWRP on my Zenfone 2 Z00A but it won't work. I cannot boot to TWRP.
My device is unlocked and rooted and I can flash boot.img, droidboot.img and stock recovery.img but TWRP IMG won't work.
After flashing TWRP using command "fastboot flash recovery twrp.img" and trying to boot into it nothing happens phone restart and boot to bootloader asking me to choose "Normal boot", "Recovery mode" "Reboot bootloader" ect.. and when I select "Recovery mode" phone restart and boot again to Bootloader not TWRP.
I also tried to flash TWRP using "Rashr" same problem not booting to TWRP.
Tethered CWM is working and I was able to boot to it but not TWRP
On the other hand if I flash back stock recovery and boot to it boots just fine.
What's wrong? Any idea guys?
Thanks in advance..
So, you've unlocked the bootloader or did you skip that part?
ultramag69 said:
So, you've unlocked the bootloader or did you skip that part?
Click to expand...
Click to collapse
Yes it's unlocked.
When I flash TWRP via CMD using fastboot command it shows successful writing TWRP IMG file. Otherwise it will show permission denied if the bootloader is locked AFAIK.
The splashscreen is white which means the bootloader is unlocked. But I don't know why it's not working.
Device is CN version flashed with WW firmware.
TWRP App-based installation
I've also tried upgrading to twrp-2-8-7-2-Z00A.img from within the TWRP Manager app. It seems to download and gets to the "installing/verifying" screen, then dies after a minute or two. The phone is rooted and unlocked. But after about the 4th or 5th try, it worked.
Ok problem solved
It turns out there was a problem with the bootloader. I used the adb commands to unlock it and it was showing successful but some how it was not unlocked fully as it seems.
The splash screen turned to white after unlocking the bootloader so I thought it was unlocked. I even tried unlocking it many times and every time the adb results were showing bootloader unlocking success but it tuned out it wasn't unlocked fully.
Today I used the official bootloader unlocking App from ASUS and unlocked the bootloader. I flash TWRP again and rebooted to recovery and BAM ! it booted to TWRP
The_wolf88 said:
Ok problem solved
It turns out there was a problem with the bootloader. I used the adb commands to unlock it and it was showing successful but some how it was not unlocked fully as it seems.
The splash screen turned to white after unlocking the bootloader so I thought it was unlocked. I even tried unlocking it many times and every time the adb results were showing bootloader unlocking success but it tuned out it wasn't unlocked fully.
Today I used the official bootloader unlocking App from ASUS and unlocked the bootloader. I flash TWRP again and rebooted to recovery and BAM ! it booted to TWRP
Click to expand...
Click to collapse
Hello, I have similar problem with my Zenfone 2 Z00A. Bootloader seems to be unlocked because of white splash screen on start-up, but I cannot flash TWRP recovery via fastboot flash recovery ***.img. The process shows no problems/errors but despite that no TWRP after reboot.
Can you explain how you found out that bootloader was not unlocked fully?
lkananowicz said:
Hello, I have similar problem with my Zenfone 2 Z00A. Bootloader seems to be unlocked because of white splash screen on start-up, but I cannot flash TWRP recovery via fastboot flash recovery ***.img. The process shows no problems/errors but despite that no TWRP after reboot.
Can you explain how you found out that bootloader was not unlocked fully?
Click to expand...
Click to collapse
I don't know why but after 4-th or 5-th attempt TWRP finally loaded.
Hi, I have a similar problem with my zenfone 2 z00A. My device is not rooted. I tried to use the process described here.
Installation
Latest releases, tools and general information
groovyandroid.github.io
I tried bootloader unlock process with the app on my phone first, but after 4-5 times of use, it always came up with 'Network error'. I went with the 2nd part of unlocking bootloader to transfer TWRP imgae file. Now the phone is starting with a white splash screen and showing 4 options: Normal boot, Power off, Recovery mode and Restart bootloader. I have tried fastboot flash recovery twrp.img and fastboot boot 'twrp.img', but still can't get to TWRP recovery process.

My Zenfone2 unable to boot into recovery mode after i flash twrp.img

Hi guys,
I just Root my phone and tried to flash recovery.img from twrp. After I did and it restart but keep boot into bootloader, I tried to boot into recovery mode and it's failed. What I try, boot into recovery mode via tethered temp recovery and flash a new rom which I downloaded here. Now the problem... My phone bricked and unable to boot into user surface.... HELP!!!! please!!!:crying::crying::crying:
You must unlock the bootloader to have twrp.
And some rom require unlocked bootloader
you want TWRP ? please unlock bootloader first
Use fastboot to reflash a stock rom and recovery.
Then unlock your bootloader and flash twrp.
Afterwards, you can flash a custom rom.

Unable to flash custom recovery

Hi,
I have the Find 7 with the new display panel.
I wanted to flash the latest version of TWRP but failed. I do not know what I did wrong.
I can use adb and fastboot without any problem. When trying to flash recovery, it says there that the flash was successful but when I reboot to recovery, TWRP was not installed and the original Oppo recovery is still there.
The bootloader is unlocked. And I tried relocking and unlocking again but to no avail. Whenever I use the command "fastboot oem unlock", nothing happens to the phone.
I am currently on spectrum. I want to try other roms such as the lite COS 2.15 and also maxwen roms since that only those supports the new panel.
I am also trying to get root for my phone and it is impossible without custom recovery.
Thanks for any help.
I had poop loads of issues with getting custom recovery on my Find 7a. Eventually I used these instructions:
http://community.oppo.com/my/forum.php?mod=viewthread&tid=996
They work. Don't know if it's the versions of ADB or Fastboot or something.
Give it a go
limbot said:
I had poop loads of issues with getting custom recovery on my Find 7a. Eventually I used these instructions:
http://community.oppo.com/my/forum.php?mod=viewthread&tid=996
They work. Don't know if it's the versions of ADB or Fastboot or something.
Give it a go
Click to expand...
Click to collapse
I will give it a go when I get back. Thanks!
This is what a forumer from the official forum said and it works:
After you had successfully flash recovery via fastboot, you MUST NOT reboot the device. AFAIK, if you reboot the device it will restore the recovery back to stock oppo recovery.
So instead, you need to immediately press vol down & power button on the fastboot screen. Keep holding the button until you see the TWRP recovery screen. Hope that helps. Cheers!""
faidz85 said:
Hi,
I have the Find 7 with the new display panel.
I wanted to flash the latest version of TWRP but failed. I do not know what I did wrong.
I can use adb and fastboot without any problem. When trying to flash recovery, it says there that the flash was successful but when I reboot to recovery, TWRP was not installed and the original Oppo recovery is still there.
The bootloader is unlocked. And I tried relocking and unlocking again but to no avail. Whenever I use the command "fastboot oem unlock", nothing happens to the phone.
I am currently on spectrum. I want to try other roms such as the lite COS 2.15 and also maxwen roms since that only those supports the new panel.
I am also trying to get root for my phone and it is impossible without custom recovery.
Thanks for any help.
Click to expand...
Click to collapse
Can u teach me how to unlock bootloader.. because when I flash twrp recovery img my fon stuck at fastboot menu, cannot enter the recovery menu.
Some say I get this problem becos I not unlock my bootloader..
Im trying to flash miui os..huhuhu
cikgutan said:
Can u teach me how to unlock bootloader.. because when I flash twrp recovery img my fon stuck at fastboot menu, cannot enter the recovery menu.
Some say I get this problem becos I not unlock my bootloader..
Im trying to flash miui os..huhuhu
Click to expand...
Click to collapse
fastboot oem unlock in bootloader mode.
azeem40 said:
fastboot oem unlock in bootloader mode.
Click to expand...
Click to collapse
Unlocking bootloader erases data?
Mine wouldn't flash recovery. It said successful but I still had oppo recovery 1.2 and it only worked when I found the latest official twrp over version 3. after flashing, I disconnected usb and then held down power button to shut the phone down. It then was able to boot to twrp ok.
I used the latest one.
https://dl.twrp.me/find7/

Stuck in Fastboot bootloop

I fumbled trying to flash a custom rom. I forgot to do the step where I unlock the bootloader. Now my phone is currently stuck on fastboot. If I choose the option to boot normally, my phone retarts and I am again in fastboot mode.
My goal here is to flash CM 13. Is this still possible? How can I get my phone to at least boot properly into recovery mode (it is rooted).
Fastboot flash stock recovery.
It worked. Thank you! I also went through all the steps again and have successfully installed a custom rom.

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