How to downgrade to oreo 8.1 - Xiaomi Mi A1 Questions & Answers

I'm using havoc OS 9.0, but I want to go back Oreo. I have a custom rom 8.1 backup (including EFS folder). how should I do??

i have same question can i flash custom oreo rom on stock pie

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Nitrogen os 8.0/8.1

Guys it's possible to go from 8.0 to 8.1 on nitrogen os. I just flashed 8.0(which I flashed with gapps) and just flashed 8.1 afterwards (without gapps) and it worked. Currently on 8.1 nos
Setup: rn3 pro Kate with nos and aroma 8.0 gapps. No need to wait for 8.1 gapps just upgrade nos from 8.0 to 8.1
I think we all know that by now ;d
Nopes
You will have to flash the entire ROM.. There isn't OTA created yet to 8.1.

revert back to stock

I now on aex 5.2 Oreo 8.1, can I revert back to the latest stock ROM ?

can i install custom oreo roms on stock pie firmware

i have a question is flashing custom 8.1 Oreo rom on Stock 9.0 Pie firmware safe? can i flash custom oreo roms on my Mi A1 Running on Stock Pie Rom?
or is there any issue with flashing oreo roms on stock pie please reply fast.

OOS Android 10 to Havoc Pie

Currently on Havoc Pie. Can I msm return to OOS(want to fully wipe phone anyways), upgrade to stable OOS Android 10 and installed twrp and install Havoc Pie?
I think if you MSM to Android 10 OOS, you will need to MSM back to pie, then flash pie havoc.
CrimsonSaber5G said:
I think if you MSM to Android 10 OOS, you will need to MSM back to pie, then flash pie havoc.
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Well, in the past, I have always been able to run older version of android on newer bootloader/radio/modem images. Like, I have been able to run marshmallow ROMs on nougat boot loader, etc

Mi a1 with custom rom, back to stock 7.1

Ho guys,
Anyone can help me with flash stock rom 7.1, actually have derpfest android 10 with magisk and twrp.
What Is the right way for flash the stock rom?
i think you cant downgrade to nougut
you can downgrade to Oreo 8.1 only

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