In order to hard reset a Acer Liquid E, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Acer Liquid E device will be brought back to the default configuration of a brand new device.
1.Heyoo! First, be so kind as to power the phone off.
2. The next step is to press and hold together Volume Down + Power button until the phone vibrates once.
3. Now quickly release Volume down and press Volume up. You should see a new menu.
4. Using Volume buttons, select option "Recovery".
5. You should be in a Recovery mode menu. Please choose "Wipe data/factory reset", using Volume buttons to scroll options, and Menu button to confirm.
6. Sekect operation "yes - delete all data"; accept it with a Menu key.
7. Lastlym select option "reboot system now". Good job!