Following sequence will present service menu on the Sony-Ericsson phones:
1. Right >
2. Asterisk *
3. Left <
4. Left <
5. Asterisk *
6. Left <
7. Asterisk *
< means move the joystick left
> means move the joystick right
It will provide model info, software info, service tests (for display, keyboard, speaker, camera, etc.) and other menus.