Hard Reset O2 XDA Stealth
- At the beginning power off the device.
- Next, press the Windows + OK + Power button at the same time for a couple of seconds.
- The operation might take several minutes.
- Success! The hard reset has just been performed. The device will reset to factory defaults and reboot.
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.