Database Users

Can only boot into locked bootloader after installing twrp, stuck in a boot loop.

Hello guys,
I'm in a very frustrating situation. After hours of research i finally post this because i couldn't find anything that helped yet.
So here's my problem:
I got my OnePlus2 today, wanted to root it straight away, and so i did. After installing TWRP and rooting my phone, i f'ed up (as i found out until now):
I went back into the developer options, disabled USB-Debugging as well as the OEM-lock, which allowed me to unlock the bootloader , because i wanted to disable developer options again (i like it clean). Bad idea, as it turns out. My bootloader is now locked again and could not be unlocked as of now, after hours of trying to figure out a way.
Another problem that came with it is the bootloop when i try to (re)start the device. The phone flashes the OnePlus-logo for half a second, vibrates, and starts again, over and over. The only way to get the phone out of the loop is by pressing POWER + VOLUME UP and booting into fastboot. Then i can do all the fastboot-commands on my PC, but i can't get into the recovery or flash anything because the bootloader is locked. Trying to 'fastboot oem unlock' only results in the device restarting and getting stuck in the bootloop i mentioned before again.
I managed to get the phone to work a few times by executing 'fastboot continue', which either starts to show the charging battery symbol or booting up like normal (about a 50% chance I'd say).
ADB commands can then be executed, but I'd need a way to flash a ROM without going into the bootloader or recovery, which seems to be impossible.
Is there any way you could help? Is there an ADB command to reset the phone to the state it was delivered, without me having any sort of backup? Or can the bootloader be unlocked via ADB?
Thanks a million in advance! :fingers-crossed:

Rattig said:
Hello guys,
I'm in a very frustrating situation. After hours of research i finally post this because i couldn't find anything that helped yet.
So here's my problem:
I got my OnePlus2 today, wanted to root it straight away, and so i did. After installing TWRP and rooting my phone, i f'ed up (as i found out until now):
I went back into the developer options, disabled USB-Debugging as well as the OEM-lock, which allowed me to unlock the bootloader , because i wanted to disable developer options again (i like it clean). Bad idea, as it turns out. My bootloader is now locked again and could not be unlocked as of now, after hours of trying to figure out a way.
Another problem that came with it is the bootloop when i try to (re)start the device. The phone flashes the OnePlus-logo for half a second, vibrates, and starts again, over and over. The only way to get the phone out of the loop is by pressing POWER + VOLUME UP and booting into fastboot. Then i can do all the fastboot-commands on my PC, but i can't get into the recovery or flash anything because the bootloader is locked. Trying to 'fastboot oem unlock' only results in the device restarting and getting stuck in the bootloop i mentioned before again.
I managed to get the phone to work a few times by executing 'fastboot continue', which either starts to show the charging battery symbol or booting up like normal (about a 50% chance I'd say).
ADB commands can then be executed, but I'd need a way to flash a ROM without going into the bootloader or recovery, which seems to be impossible.
Is there any way you could help? Is there an ADB command to reset the phone to the state it was delivered, without me having any sort of backup? Or can the bootloader be unlocked via ADB?
Thanks a million in advance! :fingers-crossed:
Click to expand...
Click to collapse
You might want to contact Naman Bhalla. I know he's helping out people fix bricked phones on xda as well as opo forums. I've messaged him as well. Hope he's got time today.
Till he replies, try to make sure that your battery stay charged, somehow.

Hetalk said:
You might want to contact Naman Bhalla. I know he's helping out people fix bricked phones on xda as well as opo forums. I've messaged him as well. Hope he's got time today.
Till he replies, try to make sure that your battery stay charged, somehow.
Click to expand...
Click to collapse
Thank you so very much! I will try to contact him.
Also battery should be no problem as I can boot the phone via fastboot. Either way, I'll have an eye on it!

Rattig said:
Thank you so very much! I will try to contact him.
Also battery should be no problem as I can boot the phone via fastboot. Either way, I'll have an eye on it!
Click to expand...
Click to collapse
I think he did message you. Check your private messages.

Hetalk said:
I think he did message you. Check your private messages.
Click to expand...
Click to collapse
Yes he did. Thanks a lot!

Rattig said:
Yes he did. Thanks a lot!
Click to expand...
Click to collapse
I'm glad your issue got resolved. :good:

If your issue is resolved then please post the solution for others it might help someone

The solution was simple i followed the guide below and it bought my phone back from the dead.
https://www.youtube.com/watch?v=R4SVSovw4Jo

sandeeppathak007 said:
If your issue is resolved then please post the solution for others it might help someone
Click to expand...
Click to collapse
I'm really sorry, I meant to post the solution but obviously I forgot...
So here's how I (with the help of aforementioned Naman Bhalla) fixed my OP2:
https:// forums.oneplus. net/threads/mega-unbrick-guide-for-a-hard-bricked-oneplus-2.347607/ (just remove the spaces i put in because I'm not allowed to post links just yet)
It's as simple as to follow the steps in this Guide. Take some time, read through it and everything should work out fine.
I can't really give more tips as I was lucky enough to be helped by the OP of the guide linked above. If nothing works for you, just try to PM him, he's a very nice and friendly guy!

Stucked on boot because of Chainflare,cant even access recovery menu.

I need help!
Im using LG P715/P716
I have a rooted phone.I want to make tweaks so I can play games smoother so I installed ChainFlare 3d then installed the drive which it needed so I can use all of the options.It gave me a warning that if I continue I have the chance of bricking my phone.My phone restarted and realized my phone was stucked in a boot loop.The most annoying thing is that I cant go to the recovery menu which is needed to restore back my phone.I tried all possible combinations,the power+volume up/down+hone didnt actually work.I already knew my phone cant go to recovery menu before this happened.Because I remembered last week,I downloaded quickboot,it didnt work also.I really want to know how to bypass the boot loop without having to gain access to recovery menu,or a solution to the recovery menu problem.HELP! Any reply would be greatly appreciated!

Hi,
This thread is being moved to your own dedicated forum where you will get better help.

RebornChieko said:
I need help!
Im using LG P715/P716
I have a rooted phone.I want to make tweaks so I can play games smoother so I installed ChainFlare 3d then installed the drive which it needed so I can use all of the options.It gave me a warning that if I continue I have the chance of bricking my phone.My phone restarted and realized my phone was stucked in a boot loop.The most annoying thing is that I cant go to the recovery menu which is needed to restore back my phone.I tried all possible combinations,the power+volume up/down+hone didnt actually work.I already knew my phone cant go to recovery menu before this happened.Because I remembered last week,I downloaded quickboot,it didnt work also.I really want to know how to bypass the boot loop without having to gain access to recovery menu,or a solution to the recovery menu problem.HELP! Any reply would be greatly appreciated!
Click to expand...
Click to collapse
Only way is installing Stock, If the recovery does not work

RebornChieko said:
I need help!
Im using LG P715/P716
I have a rooted phone.I want to make tweaks so I can play games smoother so I installed ChainFlare 3d then installed the drive which it needed so I can use all of the options.It gave me a warning that if I continue I have the chance of bricking my phone.My phone restarted and realized my phone was stucked in a boot loop.The most annoying thing is that I cant go to the recovery menu which is needed to restore back my phone.I tried all possible combinations,the power+volume up/down+hone didnt actually work.I already knew my phone cant go to recovery menu before this happened.Because I remembered last week,I downloaded quickboot,it didnt work also.I really want to know how to bypass the boot loop without having to gain access to recovery menu,or a solution to the recovery menu problem.HELP! Any reply would be greatly appreciated!
Click to expand...
Click to collapse
Hi
Open device
Disconnect battery
Keeep vol - and plug USB to PC and phone
Wait for any screen and release button
Plug battery
Good luck
I've managed to get out of BL like that if u get to fastboot then do I factory reset
ALL YOUR DATA WILL BE GONE
---------- Post added at 03:07 AM ---------- Previous post was at 02:53 AM ----------
Jonas Cardoso said:
Only way is installing Stock, If the recovery does not work
Click to expand...
Click to collapse
Lol and how do you flash stock on bootloop ? Read OP then comment .....

If it is caused by chainfire bootloop, and can not enter the recovery is the only alternative, only come into download mode
IGGYVIP said:
Hi
Open device
Disconnect battery
Keeep vol - and plug USB to PC and phone
Wait for any screen and release button
Plug battery
Good luck
I've managed to get out of BL like that if u get to fastboot then do I factory reset
ALL YOUR DATA WILL BE GONE
---------- Post added at 03:07 AM ---------- Previous post was at 02:53 AM ----------
Lol and how do you flash stock on bootloop ? Read OP then comment .....
Click to expand...
Click to collapse

...
Jonas Cardoso said:
If it is caused by chainfire bootloop, and can not enter the recovery is the only alternative, only come into download mode
Click to expand...
Click to collapse
Op is asking how to get out of bootloop and access any menu so he can install things like stock you mentioned
You basically told him what he wants to do anyway and not how to do it ...
One does not simply plug bootloop to PC and flash ....

Stuck on Encryption Unsuccessful

I apologize if this is in the wrong section this is my first time posting to xda
I tried rooting my tmobile LG V20 and cant seem to get into TWRP. Every time i boot up it goes to screen that says
"your device software cannot be checked for corruption. Lock the bootloader"
then it boots to a white screen that says Encryption Unsuccessful with a reset button at the bottom. I am unable to get into twrp with the power and volume down button.

epr2175 said:
I apologize if this is in the wrong section this is my first time posting to xda
I tried rooting my tmobile LG V20 and cant seem to get into TWRP. Every time i boot up it goes to screen that says
"your device software cannot be checked for corruption. Lock the bootloader"
then it boots to a white screen that says Encryption Unsuccessful with a reset button at the bottom. I am unable to get into twrp with the power and volume down button.
Click to expand...
Click to collapse
There is another thread around here that answers your problem. I had the same issue. Something along the lines of plug in phone and open command prompt with command : and reboot bootloader and reboot phone. When you see twrp booting and installing files hit enter and you should boot into twrp again.
I tried it about 35-40 times and failed. It finally worked after many tries. Look for the thread around here somewhere though.
---------- Post added at 04:42 AM ---------- Previous post was at 04:38 AM ----------
Found it, its under questions and answers. The title is "hi guys my tmobile is stuck in bootloop"

Happed to me too. Turn off tne phone hold vol down plug in phone that will get you into bootloader lock it then unlock it again. Mine booted right up after that.
Sent from my LG-H918 using XDA-Developers mobile app

Also stuck at the same page with the reset button please help

Locking/Unlocking Bootloader Works!!
Thank You!!! You finally got my phone to work after trying for a few days! :laugh:

jjr3211 said:
Happed to me too. Turn off tne phone hold vol down plug in phone that will get you into bootloader lock it then unlock it again. Mine booted right up after that.
Sent from my LG-H918 using XDA-Developers mobile app
Click to expand...
Click to collapse
Thank you for this tips, i Lock the bootloader and then Unlock it again as your command, and viola my phone back to life haha

The reason locking / unlocking your bootloader worked is because that formats data. If you would have formatted data in TWRP (NOT wipe -- FORMAT), then your problem would have been solved.
You got lucky, and OEM Unlock was still enabled in developer options. If it hadn't been, then you would have locked your bootloader and wouldn't have been able to unlock it.
-- Brian

runningnak3d said:
The reason locking / unlocking your bootloader worked is because that formats data. If you would have formatted data in TWRP (NOT wipe -- FORMAT), then your problem would have been solved.
You got lucky, and OEM Unlock was still enabled in developer options. If it hadn't been, then you would have locked your bootloader and wouldn't have been able to unlock it.
-- Brian
Click to expand...
Click to collapse
still have issue, i can't install ane apps now.. how to solve it please ?

jjr3211 said:
Happed to me too. Turn off tne phone hold vol down plug in phone that will get you into bootloader lock it then unlock it again. Mine booted right up after that.
Sent from my LG-H918 using XDA-Developers mobile app
Click to expand...
Click to collapse
You saved the day my friend! Locking and unlocking via fastboot did the trick. Phone booted right up.

runningnak3d said:
The reason locking / unlocking your bootloader worked is because that formats data. If you would have formatted data in TWRP (NOT wipe -- FORMAT), then your problem would have been solved.
You got lucky, and OEM Unlock was still enabled in developer options. If it hadn't been, then you would have locked your bootloader and wouldn't have been able to unlock it.
-- Brian
Click to expand...
Click to collapse
Okay - I have this too now. I have a h910 that I just followed runningnak3d's dirty santa guide on. Been flashing all around the last 2 weeks - learning a lot along the way. But today I flashed back to stock 10r. I fomatted data in TWRP - typed yes etc and it just reboots to that. I went to TWRP and installed Alpha Omega Oreo - same error. Restored one of my backups of Lineage I get the same error. So what is the right way out of this problem?
KDZ back and follow your dirty santa guide to re/unlock the bootloader? (I sure hope Brian is still around reading these) Not to screw up the terminology - but if TWRP still boots as my recovery - doesn't that mean my bootloader is unlocked.?

Well - not sure what I was doing yesterday... But wiped all, format data and factory reset in TWRP this morning and flashed h910 10r and then Magisk v20.4 and it worked. Could it be as simple as forgetting to flash Magisk? Maybe that is all that was wrong?
Thanks for reading.

Well if you find yourself in this same sticky spot - check out this here
I flashed 2018-04-15 level and my restore worked without issue.
YMMV
Good Luck

I formatted data in twrp. No change

The correct answer is to downgrade twrp, at least only that fixed it for me.

Nexus 6P - the locked bootloader and bootloop paradox

Hello!
I recently got a hold of a Nexus 6P which has the bootloop error. The previous owner never rooted it or hacked it in any way.
Meaning OEM is locked
Bootloader locked
No TWRP
My question is:
Is there any way to save this phone? I searched for almost an hour and some people claimed its doable whilst others said to give up.
Regards

robruu said:
Hello!
I recently got a hold of a Nexus 6P which has the bootloop error. The previous owner never rooted it or hacked it in any way.
Meaning OEM is locked
Bootloader locked
No TWRP
My question is:
Is there any way to save this phone? I searched for almost an hour and some people claimed its doable whilst others said to give up.
Regards
Click to expand...
Click to collapse
Super easy to fix.
Download the newest Full OTA image for angler: https://developers.google.com/android/ota
Then reboot to recovery by holding VOL-DOWN and powering on, then selecting recovery from the boot menu. Then choose "Apply Update from ADB", and use adb sideload /path/to/filenameofotaimage.zip to revive it.

Hey!
Thanks for your fast reply and your helpful tone.
However, when I choose Recovery mode it once again stucks in bootloop resulting in me never accessing recovery mode

npjohnson said:
Super easy to fix.
Download the newest Full OTA image for angler: https://developers.google.com/android/ota
Then reboot to recovery by holding VOL-DOWN and powering on, then selecting recovery from the boot menu. Then choose "Apply Update from ADB", and use adb sideload /path/to/filenameofotaimage.zip to revive it.
Click to expand...
Click to collapse
I am not sure my first reply was sent (having an unstable connection) so trying again:
When in bootloader and pressing recovery mode it goes straight back to bootloop. Hence, I cannot access recovery mode. Feels like a catch-22.

robruu said:
Hello!
I recently got a hold of a Nexus 6P which has the bootloop error. The previous owner never rooted it or hacked it in any way.
Meaning OEM is locked
Bootloader locked
No TWRP
My question is:
Is there any way to save this phone? I searched for almost an hour and some people claimed its doable whilst others said to give up.
Regards
Click to expand...
Click to collapse
maybe if you posted it in the correct forum, you would get an answer...

Moved to the correct board...

If you can't boot the phone and you can't boot to recovery and Android debugging and oem unlocking are not enabled, there isn't much (read anything) you can do. Maybe take it to a local repair shop and see if they can replace the motherboard for you.

robruu said:
Hello!
I recently got a hold of a Nexus 6P which has the bootloop error. The previous owner never rooted it or hacked it in any way.
Meaning OEM is locked
Bootloader locked
No TWRP
My question is:
Is there any way to save this phone? I searched for almost an hour and some people claimed its doable whilst others said to give up.
Regards
Click to expand...
Click to collapse
https://forum.xda-developers.com/nexus-6p/general/confirmed-hardware-defects-nexus-6p-t3610405
Heating the phone temporarily boots the phone. (You can also check videos for saving data in bootlooped LG phones)

Nexus 6P Bootloop, fastboot devices works, but no other fastboot commands work

Hello,
My wife's 6P is stuck in a bootloop. Here's what I've tried so far:
adb devices -> no result
fastboot devices -> device info is displayed
Any other fastboot command -> "FAILED (command write failed(No error))"
I unlocked her bootloader when we got the phone, but I can't flash anything. I just keep getting that error.
Any ideas? Thanks in advance for your help.

Did you update ADB and fastboot ?
https://www.xda-developers.com/google-releases-separate-adb-and-fastboot-binary-downloads/

coremania said:
Did you update ADB and fastboot ?
https://www.xda-developers.com/google-releases-separate-adb-and-fastboot-binary-downloads/
Click to expand...
Click to collapse
Yep, I'm able to see my 6P and N7 2012 via ADB, just my wife's 6P that I can't seem to get to work.

Not sure what happened, but I am now able to execute fastboot commands without getting that error. So now I'm waiting for the battery to die down enough to be able to boot recovery per this post. Hopefully this will fix it.

FlyOnTheWall43 said:
Yep, I'm able to see my 6P and N7 2012 via ADB, just my wife's 6P that I can't seem to get to work.
Click to expand...
Click to collapse
You're not able to boot to stock recovery ?
---------- Post added at 14:40 ---------- Previous post was at 14:21 ----------
What happens if you put a working twrp.img into your fastboot folder and try to boot it without flashing.
fastboot boot twrp.img
or
fastboot boot recovery twrp.img

coremania said:
You're not able to boot to stock recovery ?
---------- Post added at 14:40 ---------- Previous post was at 14:21 ----------
What happens if you put a working twrp.img into your fastboot folder and try to boot it without flashing.
fastboot boot twrp.img
or
fastboot boot recovery twrp.img
Click to expand...
Click to collapse
correct, I cannot boot to stock recovery, flash a custom recovery, or boot to a custom recovery directly (without flashing).

FlyOnTheWall43 said:
correct, I cannot boot to stock recovery, flash a custom recovery, or boot to a custom recovery directly (without flashing).
Click to expand...
Click to collapse
Just read the thread you linked, did you try the freezer, like the guy from the last post ???

coremania said:
Just read the thread you linked, did you try the freezer, like the guy from the last post ???
Click to expand...
Click to collapse
no, I just found that thread and I'm at work... going to try the freezer trick tonight.

coremania said:
Just read the thread you linked, did you try the freezer, like the guy from the last post ???
Click to expand...
Click to collapse
FlyOnTheWall43 said:
no, I just found that thread and I'm at work... going to try the freezer trick tonight.
Click to expand...
Click to collapse
Shoot, didn't help. Still continued to bootloop.

FlyOnTheWall43 said:
Shoot, didn't help. Still continued to bootloop.
Click to expand...
Click to collapse
Yes, actually the thing with the freezer i never heard that before, but if i remember right someone uses heat to make the phone bootable for a short time. May you carefully try this
with a hairdryer ??? And then try the 4 core modified boot.img

coremania said:
Yes, actually the thing with the freezer i never heard that before, but if i remember right someone uses heat to make the phone bootable for a short time. May you carefully try this
with a hairdryer ??? And then try the 4 core modified boot.img
Click to expand...
Click to collapse
ok, I can give this a try today after work and report back... thanks

The freezer trick did not work. But what helped me was to let the phones battery run out then plug it into the charger and let it boot loop for about 20 mins or so. The phone should boot at that point. I'm thinking the phone has to at least have a minimal charge to boot. Once the phone boots take it off the charger and make sure that "usb debugging" is on as well as allow "oem unlock" option. Once those settings are set go back to fast boot and attempt to flash the four core fix. It really works ????. If you leave the charger on it will go back to boot looping after it reaches 10 percent or so. Hope this helps.

pacoe said:
The freezer trick did not work. But what helped me was to let the phones battery run out then plug it into the charger and let it boot loop for about 20 mins or so. The phone should boot at that point. I'm thinking the phone has to at least have a minimal charge to boot. Once the phone boots take it off the charger and make sure that "usb debugging" is on as well as allow "oem unlock" option. Once those settings are set go back to fast boot and attempt to flash the four core fix. It really works . If you leave the charger on it will go back to boot looping after it reaches 10 percent or so. Hope this helps.
Click to expand...
Click to collapse
My bootloader is already unlocked, but I can't flash or boot the four core fix.

I know this question sounds redundant, but does your phone show your bootloader to be unlocked? Seems quite strange that it would not run the fastboot commands. What is the command that you are typing in to install the four core fix.

pacoe said:
I know this question sounds redundant, but does your phone show your bootloader to be unlocked? Seems quite strange that it would not run the fastboot commands. What is the command that you are typing in to install the four core fix.
Click to expand...
Click to collapse
no worries, I appreciate the attention/suggestions this thread is getting.... yeah, the bootloader is showing as unlocked. Also as of post #4, I am able to execute all fastboot commands now... I'm not 100% sure why it started working.

Always glad to help. Have you been able to fix the phone?

Sorry to disturb you, after I unlocked my device, I tried to flash both normal fix and 4 -core fix img > flash TWRP recovery, but I still cannot get into recovery mode, is my procedure wrong?
1) Flash 4 core fix boot img.
2) Flash TWRP recovery.
3) Boot to recovery.
4) Bootloop.
Thank you.

pacoe said:
Always glad to help. Have you been able to fix the phone?
Click to expand...
Click to collapse
No, but our Pixel 2's just showed up, so this isn't as urgent for me as it originally was. I'm hoping I can still get her old Nexus 6P and use it as our home phone with Google Voice. But, first I have to get this fix to work...
I'm able to flash the modified boot images without any errors, but I still can't get it to boot... I'm thinking it might be because my wife had to keep her phone 3-6 months behind the most current factory image (due to a poorly supported app she HAS to have for work) so I'm thinking the boot images on this thread won't work for her phone because he's on an older factory image. Am I correct in thinking this might be the problem?
I've requested that the OP of that thread either created modified boot images for the older versions of the factory images or explain how he made them so I can try to make them myself. Hopefully he's able to help me out.