Some secret tips & tricks & codes for symbian based nokia mobile phones

To know the IMEI (International Mobile Equipment Identity) No.:*#06#
To check the phones Software revision.*#0000#
To enter the service menu type.*#92702689#
Clock Stopping.*#746025625#
  
#06#Display the IMEI (GSM standard)
*#0000#Display thefirmwareversion and date
*#bta0#Display the Bluetooth MAC address (models with build-in Bluetooth radio, activate first to show address)
*#mac0wlan#Display the WLAN MAC address (models with build-in Wi-fi radio)
*#opr0logo#Clear the operator logo (3310 and 3330 only)
*#pca0#Activate the GPRS PCCCH support (early GPRS models)
*#pcd0#Deactivate the GPRS PCCCH support (early GPRS models)
*#res0wallet#Reset the mobile wallet (models with mobile wallet)
*#res0#Soft-format the memory (Symbian models only)
*#rst0#Reset to factory defaults, confirmation required (DCT4 or newer)
*#sim0clock#Display the SIM clock status (DCT3 only)
*#ssn0#Display the manufacturing serial number (mid-range and premium, non-Symbian models, and those devired from them)
*#war0anty#Display the manufacturing and repair info (no exit on DCT3)
*efr0#Enable EFR encoding (pre-2003 models)
#efr0#Disable EFR encoding (pre-2003 models)
*hra0#Enable HR encoding (pre-2003 models)
#hra0#Disable HR encoding (pre-2003 models)
#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
more tricks coming soon….