For all Symbain UIQ devices:

1.Enter 000, to go into emergency dialing then using the jogdial and the keyboard, enter the following sequence:

     UP * DOWN DOWN * DOWN *

2. This should bring up a secret service menu with three choices:
      a. Information: to access various information like software versions, IMEI, Simlock status and speech codecs supported
      b. Test Service: various function to test your phone hardware
      c. Service function: to completely reformat and reset your phone.