Phones And Their Secret Code (Current Phones)

Nokia Codes
*#0000#                   - Date of production
*#06#                       - Serial Number
*#746025625#         - To stop SIM lock
*337#                       - To enhance full rate
#3370#                     - To increase battery power
*#92702689#           - Lifespan (Expiry Date)
                                                                                    
Sony Ericsson
*#06#                      - Imei number
*0000#                    - To restore strong network
#330*0000#            - Fault correction code
0000                        - To reset factory setting
                                                                                     
 LG Codes
*#06#                      - Imei number
*0000#                    - For instant network
0000                        - To default settings
##21#                      - To cancel voice mail
                                                                                         
Chinese Codes
*#66*#                    - Set factory mode
*#8375#                  - Show software version
*#0044#                  - Set language to english
*#0000#                  - Set default language
*#300#                    - Software version