Hard Reset O2 Cosmo (HTC Excalibur)
- Device must be switched off.
- Start by pressing both Softkeys + Power button for 2 seconds.
- Confirm operation by pressing "0" key, after that handset must restart.
- Done, after restart you can use your device.
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.