In order to hard reset a Mitsubishi M320, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Mitsubishi M320 device will be brought back to the default configuration of a brand new device.
1. Power up the phone with an indicated button.
2. Now type in one of these codes: *#77218114# or *#881188# or *#9426*357# or *#118811# or *#94267357# or *#19912006# or *#3646633#
3. Device will now restart. Done.