Sony Xperia Ultra Z Hard Reset Freeze Problem Solution

Sony Xperia Z Ultra Hard Reset And Soft Reset Procedure

in Case Of Freeze Mobile Sony Xperia Have a Physical Button To Reset Device.By Pressing This Button 
5 to 10 Seconds You Can Reset The Mobile Easily.Picture Below Shows Where You Find Button.

Reset Via Settings Manu:

1. Drag the status bar downwards, selectSettings 
   
2. select Backup & reset
3. select Factory data reset 
   
4. select Reset phone
5. select Erase everything
   

To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.

Warning! All data will be erased from device memory, including system and application data, settings and downloaded applications. Back up your important data. The device will restore to factory settings.

Performing Soft Reset

If your phone or tab hangs or does not responding, try to Press and hold power key about 10 seconds. It will rebooting automatically. Or try to remove and re insert the battery and SIM Card ( If available ).