To view IMEI number *#06#
*#2254*# is the statusregister: C, BS, RR, MMI, CREAT.
*#2255*# will activate and deactivate the "DEBUG CALL"-Mode
*#2558*# will display the time in days,hours and minutes you are connected to the GSM network
To force a reconnection to the network, type : *#2562*#
To view and modify the Security Code of the phone, type: *#7489*#
To view some info about your SIM card like the phase level, the name, type: *#7378*#
To obtain information on SIM lock, Init and Flags, press: *#3377*#
To activate or deactivate Sleep Mode: *#7693*#
To get info about Sleep Mode: *#8463*#