I found this tip on how to acces the service menu on my W960i. It will work for other UIQ3 phones aswell.
To access the service menu do the following while in standby mode:
Jog Dial Up
Press * on keypad
Jog Dial Down
Jog Dial Down
Press * on keypad
Jog Dial Down
Press * on keypad
Jog Dial Down
Press * on keypad
Jog Dial Down
Press * on keypad
Wait a second and the following menu appears:
The Options under "Service information"
The Options under "Service tests"
"Format Phone memory" gives you and option screen to select Yes or No
