In order to hard reset a O2 XDA Trion, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
O2 XDA Trion device will be brought back to the default configuration of a brand new device.
1. Switch on the phone.
2. Now press both Softkeys.
3. Pick up the Stylus and press it inside the Reset button hole.
4. Follow the on screen-instructions.
5. Phone will now reset and restart, completing the hard reset process. Yaay.