Perform hard reset via key combination is easy method to reset device to factory settings. We can reset mobile in few minutes without any box or software using simple trick. This method will erase every thing on mobile memory like messages, contacts, settings etc. So it is best option to take backup of data before do that. Just follow the instructions below to reset device or remove pattern lock on HTC Inspire 4G PD98120
Turn off the device.
Press and hold the Volume Down button and the Power button and wait for the screen with three Android images to appear.
Release the Volume Down button.
Press Volume Down button to Select Factory Reset or Clear Storage and press the Power button to select.
NOTE: A message displays: This will delete all user data.
Press Volume Up button to Clear Storage.