Nokia Mobile secrete codes

To check the phone's Software Version
Dial : *#0000#
To enter the service menu type: *#92702689#
Clock Stopping: *#746025625##06#
Display the IMEI (GSM standard): *#0000#
Display the firmware version and date: *#bta0#
Display the Bluetooth MAC address ( models with build-in Bluetooth radio, activate first to show address)
Dial : *#mac0wlan#
Display the WLAN MAC address (models with build-in Wi-fi radio)
Dial : *#opr0logo#
Clear the operator logo (3310 and 3330 only)
Dial : *#pca0#
Activate the GPRS PCCCH support (early GPRS models)
Dial : *#pcd0#
Deactivate the GPRS PCCCH support (early GPRS models)
Dial : *#res0wallet#
Reset the mobile wallet (models with mobile wallet)
Dial : *#res0#
Soft-format the memory (Symbian models only)
Dial : *#rst0#
Reset to factory defaults, confirmation required (DCT4 or newer)
Dial : *#sim0clock#
Display the SIM clock status (DCT3 only)
Dial : *#ssn0#
Display the manufacturing serial number
(mid-range and premium, non-Symbian models, and those devired from them) Dial : *#war0anty# (92702689)
Display the manufacturing and repair info(no exit on DCT3)
Dial : *efr0#
Enable EFR encoding (pre-2003 models)
Dial : #efr0#
Disable EFR encoding (pre-2003 models)
Dial : *hra0#
Enable HR encoding (pre-2003 models)
Dial : #hra0#
Disable HR encoding (pre-2003 models)
Dial : #pw+1234567890+n#
Display the SIM lock status:
(pre-2003 models)
n = 1: provider lock
n = 2: network lock
n = 3: country lock
n = 4: SIM lock

Refferd from kingdom-v