I made system/data backups and tried to switch from beta 21.11.17 to stable on Mi 9T Pro.
Flashing went fine and to my surprise it booted up to lockscreen without me having to format data. That's just amazing!
I've checked basic things like wifi, messages, calls, cameras, nfc payments and everything works fine to me.
Follow up from
my post on 21.11.17, just in case this helps to anyone owning a Mi 9T Pro.
I saw the comment above from
@LosTigeros and I tried to follow the steps he provided. Like him, I own a Mi 9T Pro and I was using version 20.12.9 Beta (MIUI 12.3, Android 10 QKQ1.190825.002) (which is now around a year old).
1. I made a backup of everything just in case
2. Dirty flash from 20.12.9 Beta to 21.11.17 Beta, clearing dalvik/cache. Upgrade worked fine and the phone booted normally after a few minutes on the MIUI logo screen
3. Dirty flash from 21.11.17 Beta to latest stable (xiaomi.eu_multi_HMK20ProMI9TPro_V12.5.6.0.RFKCNXM_v12-11.zip), clearing dalvik/cache again. Same as above.
Everything I use on a daily basis seems to work fine. I've only encountered a problem launching the Xiaomi Gallery app (version 2.3.1.7), it just crashes. Third party gallery apps work fine. I followed the steps provided on
this post from
@geoorg and it seems to have fixed the issue.
@Poney70 suggested to fix/update the MIUI Gallery app by installing
TWRP_MIUI_Gallery_xiaomi.eu_3.3.1.10_Installation.zip in TWRP. I haven't tried that solution because the one suggested by
@geoorg worked, but I'm not sure if I should install that zip anyway since I'm using version 2.3.1.7 of the Gallery app and, according to the file name, that zip file would install version 3.3.1.10 (which
should be newer).
Thanks again to
@LosTigeros for trying this solution and reporting it on the forums and to
@geoorg and
@Poney70 for their help and various suggestions