In order to hard reset a Mitsubishi M750, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Mitsubishi M750 device will be brought back to the default configuration of a brand new device.
1. Switch on the phone.
2. One of these codes needs to be typed in: *#9426*357# or *#118811# or*#19912006# or or *#3646633# or *#77218114# or
3. Phone will now reset'n'restart. Yaay.