How to hard reset htc desire in case of pattern lock forgot or problem in operating system. Pattern lock is screen pattern which provide security feature to safe mobile from unauthorized access. It is necessary to set google account before setup screen pattern lock. if any one draw pattern wrong many times then mobile asks for google account to reset lock. If pattern lock not set then we can unlock pattern lock by hard reset method via key combination.
Note: All data will be lost so take backup before perform hard reset.
1.Power off your phone
2.Press together volume down + power button
3.Select with volume button “factory reset” and press power button to confirm
4.Wait until the phone restarts