Hard Reset ACER Liquid Z5
- Turn off the phone, then press and hold Power button until you feel vibrates.
- Then release Power button and press and hold Volume Up + Volume Down for few seconds.
- Press Camera button to confirm operation "Clean Boot".
- Now your phone will restore to the factory default.
Hard Reset ACER Liquid Z4 - Clear eMMC in ACER
How to Hard Reset ACER Liquid Z4 - Delete All Data / Reset Android
Help! This doesn't work
Hard Reset will erase all of your data
All described operations you are doing at your own risk.