Try this Hard Reset: Press Volume-Down Key, Camera Key, then power key.
Hold until ‘android system recovery’ screen shows up.
Press Menu Button to show to the ‘Android System Recovery Options’.
Highlight “wipe data/factory reset” by Using Volume Down Button.
To execute press the Camera key
On confirmation screen, select ‘Yes — delete all user data’.
Press Camera key to run factory reset.
Once the Data wipe is complete, highlight ‘Reboot System Now’.
Press Camera key to Execute Master Reset
Tap the Menu key - Tap Settings - Scroll to and tap Privacy - Tap Factory data reset - Read the message about erasing data - Tap Reset phone - Tap Erase everything.