Originally Posted by abheshekk
I am using Nuts .681 buid on my z1 it is pre-rooted, now i want to upgrade to .757 can anyone tell me how to upgrade and root it.
Just download the flashable.zip and stripped FTF. Place stripped FTF in C:/Flashtool/Firmwares and flashable.zip on SD card in your phone.
Flash flashable zip in recovery. Once the flashing is finished DO NOT REBOOT. Go back and from the menu select Reboot and then Power Off.
Once the phone is switched off connect it to the computer with vol down key pressed (in Flashmode) and flash Stripped FTF with Flashtool.
Voila that's it