Acer Liquid Glow hard reset
Turn off your phone, then press and hold the Power until you feel your smartphone vibrate and/or you see the Acer logo screen. Press and hold the Volume up and Volume down buttons. Use the Volume up button to select Clean boot:YES. Press the camera button to confirm. Note: This may not work, but works on other acer smartphone.
Alternatively you can use the menu option:
If your phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset; click Reset phone and then Erase everything to format your phone.