Hard Reset HTC P5520 (HTC Niki)
- Use Power button to turn the device off.
- Press and hold at the same time Power button + Call button + End button.
- Then follow up the instruction on screen.
- Master reset should take couple mintues so wait patiently.
- Done, your device is ready to work on.
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.