Today i upgraded my z ultra to android 5 via sony's update center and everything was fine but when activated this new feature ultra stamina mode message show up unfortunately stopped ultra stamina mode.i restarted my phone with power button and volume up key now when i try turn it on it will stuck on boot animation. tried physical hard reset key placed beside simcard slot and no luck. Please help me
note: my device is not rooted:crying:
note: my device is not rooted:crying:
xda-developers