Hard Reset ACER S56 Liquid Jade S - reset and bypass screen lock
Hard Reset ACER S56 Liquid Jade S - wipe device by factory reset
How to Hard Reset ACER Liquid Z630 - Delete Data / Format Android
Hard Reset ACER Liquid Z630 - Bypass Screen Lock / Factory Reset
Hard Reset will erase all of your data
All described operations you are doing at your own risk.