OP 6 stuck with no IMEI/MEID/BASEBAND/MAC address

[Ankur 116]

Hi,

My OP6 is stuck and keeps restarting. I have flashed all stock roms via MSMtool from hydrogen OS to Oxygen OS 10.3.5. Even tried fastboot rom flashing with no luck.

Flashed stock OS via twrp still nothing.

I do have a backup of my EFS partition but flashing that via fastboot/terminal makes no difference in any stock OS.

I have searched every topic related to this particular error but didn't find any fix yet so was forced to create a new thread.

Need urgent help, it has been 3 months now and nothing worked. Few times my phone did boot properly with IMEI and other details but after few days same error( Don't remember what I did which fixed earlier)

Also, I did visit the repair shop but they didn't find any motherboard or IC damage whatsoever.

Experts/Mods need your help.

 

[immi803]

{Mod edit: Quoted post deleted!}

If you've efs backup which is uncorrupted, modemst1 & modemst2, flash modem files via fastboot, flash twrp image, flash twrp zip installer, reboot to recovery, wipe all partitions & flash OOS and simply reboot after flash, if your efs backup is not corrupted already, it should boot up fine

 

[Ankur 116]

Unfortunately it didn't work for me. Now when I'm flashing oos 9 and above, 10.3.5 via MSMtool from unbrick thread..the OEM unlocking is greyed and can't unlock bootloader.

I hope I find a solution as nothing is working, how to verify if the EFS backup I have is not corrupted? Also, I do have a QCN file for IMEI backup will that be of any use?

 

[lazye53]

Have you tried 5.1.5 oos? Even if it is an old android version, it should save your device and as far as I know it does not change anything if the bootloader is off.

 

[Ankur 116]

Yes I tried, Oneplus_6_A6000_international_Oxygen_OS5.1.5_22_O.09_180517(MSMTool) still no imei/meid/mac address and frequent restarts.

 

[Ankur 116]

Is there a fix for restoring EFS partition if the backup is corrupt?

Msmtool won't fix it? Flashing persist is also of no use

 

[Ankur 116]

Guys any fix for EFS PARTITION? If it's corrupted

 

[Ankur 116]

If you've efs backup which is uncorrupted, modemst1 & modemst2, flash modem files via fastboot, flash twrp image, flash twrp zip installer, reboot to recovery, wipe all partitions & flash OOS and simply reboot after flash, if your efs backup is not corrupted already, it should boot up fine

Pls need help on this. Still not able to fix it.

It has been months now. How to check if EFS partition is corrupted or not?

 

[Ankur 116]

Have you tried 5.1.5 oos? Even if it is an old android version, it should save your device and as far as I know it does not change anything if the bootloader is off.

I tried 5.1.5 oos but nothing is working

 

[immi803]

Pls need help on this. Still not able to fix it.

It has been months now. How to check if EFS partition is corrupted or not?

You have followed the steps above mentioned??

 

[Ankur 116]

You have followed the steps above mentioned??

Yes I did. After that device went into crash dump mode.

How to resolve that now. Not sure if everything was restored.

 

[immi803]

Yes I did. After that device went into crash dump mode.

How to resolve that now. Not sure if everything was restored.

Press power + vol up key to get out of crash dump mode
Than restart device into recovery mode by power + vol down key
Factory reset , wipe everything option and reboot

 

[Ankur 116]

Press power + vol up key to get out of crash dump mode
Than restart device into recovery mode by power + vol down key
Factory reset , wipe everything option and reboot

I went to fastboot and then recovery. Wiped and resettled as you asked. But again going in crashdump mode.

Attaching the error details.

 

[immi803]

I went to fastboot and then recovery. Wiped and resettled as you asked. But again going in crashdump mode.

Attaching the error details.

Modem is crashing, are you sure you've properly fastboot modemst1 & modemst2 files?
How you pushed these modem files using fastboot? What command exactly?

 

[Ankur 116]

Modem is crashing, are you sure you've properly fastboot modemst1 & modemst2 files?
How you pushed these modem files using fastboot? What command exactly?

I have tried fastboot flash modemst1 modemst1.bin
And same for modemst2.

Also, I tried flashing EFS partition backup via twrp using restore option.

 

[immi803]

I have tried fastboot flash modemst1 modemst1.bin
And same for modemst2.

Also, I tried flashing EFS partition backup via twrp using restore option.

You should try msmtool or fastboot rom flash

 

[Ankur 116]

You should try msmtool or fastboot rom flash

Used msmtool but whichever MSMTOOL I'M using still going to crash dump mode.

Can't use fastboot roms as bootloader is locked.

 

[immi803]

Used msmtool but whichever MSMTOOL I'M using still going to crash dump mode.

Can't use fastboot roms as bootloader is locked.

Your bootloader is locked????
Try to unlock it using command "fastboot oem unlock" , without commas in fastboot mode
See if it unlocks it?

 

[Ankur 116]

Your bootloader is locked????
Try to unlock it using command "fastboot oem unlock" , without commas in fastboot mode
See if it unlocks it?

I used msmtool as asked. So bootloader was locked. Since I'm not able to boot in OS due to crashdump error not able to enable OEM unlocking.

So kinda stuck here.

 

[Ankur 116]

Your bootloader is locked????
Try to unlock it using command "fastboot oem unlock" , without commas in fastboot mode
See if it unlocks it?

Any help on this will be appreciated