There is another Android 11 AOSP firmware that runs PERFECT, stable, and right on my BV9600E.
It is CAOS 11 (The official firmware forum site:
https://forum.xda-developers.com/t/offi ... 1.4265059/ )
Also, there is another Android 11 proyect from the same creator. It is LiR (forum link:
https://forum.xda-developers.com/t/unof ... r.4237683/ ) which is very similar to CAOS 11, and you can change flash updates between them.
You must decide: CAOS or LiR !!!!
I give you 2 links to proceed to update to CAOS (is all that you must need to update it):
1 - The updated drivers and instructions how to flash via TWRP BV9600E :
https://www.getdroidtips.com/aosp-andro ... iew-BV96002 - The file to flash CAOS-Android 11 on this BV9600E device via TWRP : https://sourceforge.net/projects/treblerom/files/CAOS11/2021.08.15/caos-v312-210815-arm64-bgZ.img.xz/download?use_mirror=netix
Good luck, and remember: there are 2 proyects ... CAOS and LiR
Bye.