Software version:
*#06#
to see more info, press softkey again
English menu:
*#0001#
Deutsch menu:
*#0049#
Secret Code:
*#0606# remove sim card before
Unlock Sim:
*#0003*(secret code)#
Bonus Screen:
*12022243121
Factory settings: Type
*#9999#
to reset factory settings.(not tested).