Hi! IMHO I have low sound level, but I can use it without any problems, including with a bluetooth headset.
Step flashing MIUI last chinesse version is needing. I first have flash global MIUI, and I have low battery without deep sleep! Here I flashing chinesse , and next TWRP, and next Pixel Expiriens - good working it!
No turbo charge, only rapid charge.
Unusable! The battery life is very short, consuming 10% of electricity per hour. I gave up and returned to MIUI 12.5.8...I found this https://github.com/chaptsand/androi...ce_Plus_umi-11.0-20210922-1413-UNOFFICIAL.zip, but I haven't tested this ROM.
Whether it’s good or not, you only know if you use it.If you feel my work is rubbish, just use stock ROM instead.
After some tries, I have fixed it this way: