After Pie: Bootloader unlocked & TWRP install didn't work

[cyrrel]

Hi,

I was really unhappy with Pie and tried to prepare my device for Oreo downgrade.
What I did was
- unlock bootloader
- tried to install TWRP
- mixed something up in that processs
- realized TWRP cannot be installed apparently on Pie right now
- MiFlash seems to be not working as well when trying to install stock rom (says flashing but nothing happens)

Well Pie is running right now, but when trying to lock the bootloader again for future updates, the phones is only showing a black screen.
After that I am trying to unlock bootloader again (fastboot oem unlock) and everything works again, except when I try to boot into recovery ("the system is destroyed" or something like that).

Trying to "hotboot" into TWRP currently is also not working, "unable to mount..." and after that automatically reboots into the system itself.

Any idea how I can either put a standard Pie installation with working recovery and locked bootloader on?
Or how I can maybe install Oreo instead? As I said, the MiFlash tool doesn't do anything (tells me "flashing" but actually doesn't do anything).

Thanks for your help!

 

[KuGeSch]

Hi,

I was really unhappy with Pie and tried to prepare my device for Oreo downgrade.
What I did was
- unlock bootloader
- tried to install TWRP
- mixed something up in that processs
- realized TWRP cannot be installed apparently on Pie right now
- MiFlash seems to be not working as well when trying to install stock rom (says flashing but nothing happens)

Well Pie is running right now, but when trying to lock the bootloader again for future updates, the phones is only showing a black screen.
After that I am trying to unlock bootloader again (fastboot oem unlock) and everything works again, except when I try to boot into recovery ("the system is destroyed" or something like that).

Trying to "hotboot" into TWRP currently is also not working, "unable to mount..." and after that automatically reboots into the system itself.

Any idea how I can either put a standard Pie installation with working recovery and locked bootloader on?
Or how I can maybe install Oreo instead? As I said, the MiFlash tool doesn't do anything (tells me "flashing" but actually doesn't do anything).

Thanks for your help!

https://forum.xda-developers.com/mi-a1/development/treble-twrp-installer-treble-manager-t3793637

 

[cyrrel]

Hi,

I somehow managed to put 8.1 on and everything is back to normal.

Thanks

 

[anshsharma240]

Hi,

I somehow managed to put 8.1 on and everything is back to normal.

Thanks

can you explain us the procedures that you have followed to downgrade. It would be really helpful. i have tried this
method but it didn't work for me. i am facing IMEI 0/no signal issues using this method.
Thanks

 

[cyrrel]

well I have done a lot of stuff that made my phone not working anymore because using a wrong .img file and didn'T understand the tutorial (same link you have provided) fully.

But at the end it was quite close to the link you have sent, the MiFlash tool I needed for example to try like 10 times per step until it worked, maybe a bad cable - I don't know.
But finally it was working, after March update without network signal, but with /boot & /efs partitions and Nov fastboot image, it was working.
If you need any more detail for a specific step, you can of course ask and I can check if there was anything special I can remember

 

[anshsharma240]

well I have done a lot of stuff that made my phone not working anymore because using a wrong .img file and didn'T understand the tutorial (same link you have provided) fully.

But at the end it was quite close to the link you have sent, the MiFlash tool I needed for example to try like 10 times per step until it worked, maybe a bad cable - I don't know.
But finally it was working, after March update without network signal, but with /boot & /efs partitions and Nov fastboot image, it was working.
If you need any more detail for a specific step, you can of course ask and I can check if there was anything special I can remember

Are your imei & mac same as original? won't the imei/mac get affected by restoring someone else efs?

 

[cyrrel]

I don't know about mac, but imei is ok