In order to hard reset a BenQ M220, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
BenQ M220 device will be brought back to the default configuration of a brand new device.
1. Turn the phone on.
2. Enter Standby screen.
3. Now type in this code: *#9999#. Press Call button.
4. The handset will now restart. Well done, the hard reset is complete.