Samsung Secret Code.....

1.*#9999#         Software version

2.  *#06#           IMEI number: 

3. *#0001#       Serial number

4.*#9998*246#   Battery status- Memory capacity

5. *#1111#         S/W Version
6. *#1234#         Firmware Version
7. *#2222#         H/W Version
8. #*5737425#   JAVA Mode
9.. *#2255#        Call List
10. *#232337#    Bluetooth MAC Adress
11. *#5282837#  Java Version
12. *2767*226372#  Camera Reset (deletes photos)
13. #7263867#          RAM Dump (On or Off)
14. *7465625*746*Code#   Enables SIM lock
15. #7465625*746*Code#    Disables SIM lock

16.#*5376#          DELETE ALL SMS!!!!

17. *#9998*947#     Reset On Fatal Error

18. *2878*3855#    To format and erase all the data from the mobile memory.