I have two Razr M phones
The old one was running KK, since yesterday I rooted it and unlocked the bootloader!
I have a new xt907 which was running JB, rooted, Safestrap was installed .
I can稚 update the new phone to KK.
I read every thread on update problems
I uninstalled Safestrap
I tried to flash every version of fastboot files with RSD lite and even the Universal script generator , which worked fine on my old phone when I upgraded to KK.
What do I try next?