The Volla 22 (Gigaset GS5) Thread

[Fellfrosch]

Does this help?:

SFOS on Volla Phone with boot manager

howto ‘uninstall’ abm, or better revert abm: take uninstaller.zip, take twrp, select install, choose the zip and swipe to do the reflash seems you need to reflash lk image using fastboot, see above