https://github.com/HelloVolla/volla-os- ... ease-Notes
Volla OS 12
28. bis 30. November
Android November security update
Completely redesigned Volla Boot Manager (Volla Phone 22, Volla Phone X23)
Simplified installation of another operating system for multi boot
After automized setup of the sd card tap on "free space" and select operating system
Optionaly you can decrease the size of the partition for the operating system to add another one or external storage later
Support of Ubuntu Touch as a second operating system for both devices
Fix for some previously not supported sd cards
Fix for colume control for hands free calls (Volla Phone 22)
Fix for main camera resolution (Volla Phone X23)
Fix for slow motion (Volla Phone X23)
Fix for battery drain (volla Phone X23)