In order to hard reset a Mitsubishi Trium Sirius, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Mitsubishi Trium Sirius device will be brought back to the default configuration of a brand new device.
1. Power up the device.
2. Type in one of these codes: *#881188# or *#94267357# or *#9426*357# or *#3646633# or *#77218114# or *#19912006# or *#118811#
3. Wait until your phone resets and reboots.