พอดีเพื่อนส่งมาให้ แต่ยังไม่ได้ลองเลยค่ะ เลยเอามาฝาก
ที่มาค่ะ http://forum.gsmhosting.com/vbb/archive/t-303144.html

SAMSUNG:
*#06# -> Displays imei
*2767*5282# -> Java Reset and (Deletes all Java Midlets)
*2767*63342# -> Reset Media (Deletes All Sounds and Pics)
*2767*927# -> Wap Reset
*#9998*4357# -> Help Menu
*#9998*5282# -> Java menu (GRPS/CSD settings for JAVA server)
*#9999#0# -> Monitor Mode
*#9999# or *#9998*9999# -> Software Version
*#8888# or *#9998*8888# -> Hardware Version
*#9998*746# or *#9998*0746# or *#0746# -> Sim Infos
*#9998*523# or *#9998*0523# or *#0523# -> Display Contrast
*#9998*842# or *#9998*0842# or *#0842# -> Vibration On (until you push OK)
*#9998*289# or *#9998*0289# or *#0289# -> Buzzer On (until you push OK)
*#9998*288# or *#9998*0288# or *#0288# -> Battery & Field Infos
*#9998*377# or *#9998*0377# Error log
*#9998*778# or *#9998*0778# or *#0778# -> Sim Service table
*#9998*782# -> show date and alarm clock
*#8999*638# -> show network information
*#9998*5646# -> change operator logo at startup
*#9998*76# -> production number
*#9998*968# -> view melody for alarm
*#9998*585# -> Non-Volatile Memory (NVM)
*#3243948# -> Digital Audio Interference Off
*#32436837# -> Digital Audio Interference
*#9999# -> Show Software Version
*#0837# -> Show Software Version (instructions)
*#0001# -> Show Serial Parameters
*#9125# -> Activates the smiley when charging.
*#9998*228# -> Battery status (capacity, voltage, temperature)
*#9998*246# -> Program status
*#9998*324# -> Debug screens
*#9998*364# -> Watchdog
*#9998*427# -> Trace Watchdog
*#9998*544# -> Jig detect
*#9998*636# -> Memory status
*#9998*785# -> RTK (Run Time Kernel) errors *#9998*786# -> Run, Last UP, Last DOWN
*#9998*837# -> Software Version
*#9998*862# -> Vocoder Reg – Normal, Earphone or carkit can be selected
*#9998*872# -> Diag
*#9998*947# -> Reset On Fatal Error
*#9998*999# -> Last/Chk
*#9998*9266# -> Yann debug screen (=Debug Screens?)
*#9998*9999# -> Software version
*2767*2878# -> Custom EEEPROM Reset
*2767*3855# -> Full EEPROM Reset
This code will remove sp lock in some models
But also changes IMEI to 447967-89-400044-0,
____________________________________________
Samsung s300 unlock code
enter these 5 codes without sim card in phone!
your phone should then be unlocked

1. *2767*63342#
2. *2767*3855#
3. *2767*2878#
4. *2767*927#
5. *2767*7822573738
____________________________________________
Samsung v200 unlock codes

Enter these codes into phone without sim in phone
This will not work on some new versions

1. *2767*63342# then press green button
2. *2767*3855# then press green button
3. *2767*2878# then press green button
4. *2767*927# then press green button
5. *2767*7822573738# then press green button