All through 2015, a string of Android OS Lollipop updates were released for the Innjoo One 3G phone. While the updates worked on a few phones, for most, there were severe bugs that caused bootloops.

Finally, an update that works has been released but not by Innjoo but by an individual who ported the 12.1 version (Lollipop 5.1.1) of the open source Android operating system, Cyanogenmod, to Injoo One 3G.

Details and installation instructions for this update can be found here