Nokia mobile phone Secret Codes

    On the main screen type

*#92702689#                         Displays :
                1.Serial Number,   2.Date Made,    3.Purchase Date,         
                             4.Date of last repair            5.Transfer User Data

*#7328748263373738#             resets security code.
Default security code is 12345

 *#06#                  Dail to check the IMEI (International Mobile Equipment Identity).
*#7780#              Dail to reset to factory Settings.
*#67705646#    This Codr clear the LCD display (operator logo).
*#0000#              Dail to view software version.
*#2820#               For Bluetooth device address.
*#746025625#    Sim clock allowed status.
*#62209526#     Display the MAC address of the WLAN adapter. This is available 

                                 only in the newer devices that support WLAN
#pw+1234567890+1#     Shows if sim have restrictions.
 
 *#1471#         Last call (Only Vodafone)
*#21#                Allows you to check the number that "All Calls" are diverted to
*#30#                Lets you see the private number
*#43#               Allows you to check the "Call Waiting" status of your phone.
*#62#               Allows you to check the number that "Divert If Unreachable 
                          (no service)" calls are diverted to
*#67#              Allows you to check the number that "On Busy Calls" are diverted to
*#67705646#   Removes operator logo on 3310 & 3330
*#73#                 Reset phone timers and game scores
 
*#92702689#       you may find some of the information below through the Secret 
                                  Menu:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)

*#3370#                Enhanced Full Rate Codec (EFR) activation. Increase signal strength, 
                                better signal reception. It also help if u want to use GPRS and the 
                                service is not responding or too slow. Phone battery will drain faster
                                 though.
*#3370*              (EFR) deactivation. Phone will automatically restart. Increase battery 
                             life by 30% because phone receives less signal from network.
*#4720#           Half Rate Codec activation.
*#4720*            Half Rate Codec deactivation. The phone will automatically restart
 
If you forgot wallet code for Nokia S60 phone, use this code reset: 
                            *#7370925538#
Note, your data in the wallet will be erased. Phone will ask you the lock code. Default lock code is: 
                                12345
*#3925538#      to delete the contents and code of wallet.

Unlock service provider: Insert sim, turn phone on and press vol up-arrow keys) for 3 seconds, should say pin code. Press C, then press * message should flash, press * again and 04*pin*pin*pin#

*#746025625#          Displays the SIM Clock status, if your phone supports this power saving feature "SIM Clock Stop Allowed", it means you will get the best standby time possible  *#7780#  Restore factory settings
*#8110#  Software version for the nokia 8110