Samsung mobile tricks......

1. *#06# IMEI code
2. *#9998*5282# Java menu (GRPS/CSD settings for JAVA server)
3. *#9999#0# Monitor Mode
4. *#9999# or *#9998*9999# Software Version...............
5. *#8888# or *#9998*8888# Hardware Version
6. *#9998*746# or *#9998*0746# or *#0746# Sim Infos
7. *#9998*523# or *#9998*0523# or *#0523# Display Contrast
8. *#9998*842# or *#9998*0842# or *#0842# Vibration On (until you push OK)
9. *#9998*289# or *#9998*0289# or *#0289# Buzzer On (until you push OK)
10. *#9998*288# or *#9998*0288# or *#0288# Battery & Field Infos
11. *#9998*377# or *#9998*0377# Error log
12. *#9998*778# or *#9998*0778# or *#0778# Sim Service table
13. *#9998*782# show date and alarm clock
14. *#8999*638# show network information
15. *#9998*5646# change operator logo at startup
16. *#9998*76# production number
17. *#9998*968# view melody for alarm
18. *#9998*585# Non-Volatile Memory (NVM)
19. *#3243948# Digital Audio Interference Off
20. *#32436837# Digital Audio Interference On