Here are Secret Codes of Samsung Mobiles
CDMA
Nam Set: ##Spc
Test Mode: 47*869#1235
NGG Setting (Gateway, etc.): ##2769737,ok
Vocoder: ##8626337,ok
CAI Change: ##7738,ok
Enable TTY: ##889,ok
Debug Menu: ##33284,ok
Service Menu: Menu+8+0 (#889)
Reset (Life time, Clear Memory, etc): ##786,ok
A-key: ##2539,ok
Label Selection: ##3882,ok
Label(Home, Work, etc) : **523,ok
GSM
Phone Lock : *2767*2878#
Phone Reset : *2767*3855#
Display IMEI : *#06#
Java Reset : *2767*5282#
WAP Reset : *2767*927#
Reset Media : *2767*63342#
Help Menu : *#9998*4357#
Java Menu : *#9998*5282#
Monitor Mode : *#9999#0#
Software Version : *#9999# or *#9998*9999#
Hardware Version : *#9999# or *#9998*8888#
Sim Info : *#9998*746# or *#0746#
Display Contras : *#9998*523# or *#0523#
Vibra On : *#9998*842# or *#0842#
Buzzer On : *#9998*289# or *#0289#
Baterry and field info : *#9998*288# or *#0288#
Error Log : *#9998*377# or *#0377#
Sim service table : *#9998*778# or *#0778#
Show date and alarm : *#9998*782# or *#0782#
Show network info : *#8999*638#
Change Operator Logo : *#8999*5646#
Production Number : *#9998*76#
View Melody Alarm : *#9998*968#
Non Volatile Memory : *#9998*585#
Digital Audio Interference off: *#3243948#
Digital Audio Interference : *#32436837#
Show Software Version : *#9999#
Intruction Software : *#0837#
Show Serial Parameter : *#0001#
