Firmware downgrade - Xiaomi Mi 8 Questions & Answers

I´m on xiaomi.eu 9.3.7 and I want to try a custom ROM that needs miui 9.2.14 firmware.
Is it safe to downgrade firmware or will it brick my phone?
Is the ARB mecanism inside ROM or firmware?

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My device is Brazil 1802 USA - Could i flash Indian Stock Firmware ?

My device is 1802 firmware USA - BR
Could i flash Indian firmware stock, or will brick ?
I think if yes, its solve my problem, when i try flash oreo custom roms.
I lose IMEI ever, if i flash stock indian, and put custom oreo, baseband is the same, my IMEI remains...all right ?
Or brick ?
PS: this method persist.zip not ok for me, he make me lose IMEI when i put oreo, so, not want more this method.
Thanks for attention.
joaonds said:
My device is 1802 firmware USA - BR
Could i flash Indian firmware stock, or will brick ?
I think if yes, its solve my problem, when i try flash oreo custom roms.
I lose IMEI ever, if i flash stock indian, and put custom oreo, baseband is the same, my IMEI remains...all right ?
Or brick ?
PS: this method persist.zip not ok for me, he make me lose IMEI when i put oreo, so, not want more this method.
Thanks for attention.
Click to expand...
Click to collapse
No Brick
I used indian firmware
All firmware are global,works on all models g5s plus
Only u won't have ota updates on Indian rom

restoring backed up stock roms modem to a custom rom

I would just like to know what would happen if i tried restoring a backed up version of the stock modem that come with my phone through TWRP. would it be safe or would i have a bricked phone by the end of it?
hi,
though I'm not experienced with that, it appears to be safe to restore a modem at the Redmi Note 4X.
Unsure about Redmi 4X but I'm interested too.
edit: there's already a discussion about flashing modems at XDA unter FIRMWARES:
https://forum.xda-developers.com/xiaomi-redmi-4x/how-to/firmwares-t3682965#9
bR
What is unsafe is having a Marshmallow firmware for a Nougat ROM and up, if you plan to use Nougat or newer I'd recommend flashing 37_PA, the newest firmware from Global Dev MIUI, firmwares should be always universal unless it's noted, some MIUI update also comes with a firmware, if you see some Nougat ROM they'll ask you to update to a newer firmware if you were on Marshmallow, which is why MIUI 8 (MM) to 9 (N) will also update your firmware
TLDR; if your backed up firmware is from Marshmallow and your ROM is Nougat or newer no it's not safe, otherwise everything is good, if you want to update firmware just flash the boot.img from TWRP
hey thatnks much imma check it out
alright ill try this out as well thank you

Global Update 10.1.1.0 safe to update?

I just got OTA Update to 10.1.1.0
Iam still on locked bootloader but want to unlock as soon as i can and flash AOSP
Is there any disadvantage like ARB when i update?
I think the ARB is just when going from one version of MIUI to a previous MIUI version. I think you should be okay when wiping everything and then flashing AOSP
Hi there,
Same question I have. I am on miui 10.0.3.0 and with twrp and rooted with magisk. /unlocked bootlooder of course/
Just got ota update to 10.1.1.0
Phone is global roms are official from xiaomi.
Rooting was a pain in the a** so I really dont want to mess it up about this encrypted issues…
AFAIK are all AOSP Roms for Dipper based on Pie. So it should be easier to switch the rom if your are already on a Pie based Stock rom. So go ahead and good luck for the AOSP-Trip. :fingers-crossed:

can i flash the latest xiaomi firmware over a custom rom?

Please some body tell what is firmware.
Can i flash it over a custom rom
Cause i have downloaded a latest firmware which is about "48 mb" in size.
Or
I may drop the idea of flashing the firmware.
Link. https://xiaomifirmwareupdater.com/#weekly

Question Is it possible to install a M325FV stock firmware into M325F phone ?

Is it possible to install a M325FV stock firmware into M325F phone ?

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