Below are secret codes meant for Samsung phones only. Be careful when applying these codes as they may have negative impact on your device if you do not know what you are doing
*#1111# S/W Version
*#1234# Firmware Version
*#2222# H/W Version
*#8999*8376263#AllVersions Together
*#8999*8378# Test Menu
*#4777*8665# GPSR Tool
*#8999*523# LCD Brightness
*#8999*377# Error Menu
*#8999*327# EEP Menu
*#8999*3825523# Don’t Know.
*#8999*667# Debug Mode
*#92782# PhoneModel (Wap)
#*5737425# JAVA Mode
*#2255# Call List
*#232337# Bluetooth MAC Adress
*#5282837# Java Version
#*4773# Incremental Redundancy
#*7752# 8 PSK uplink capability bit
#*7785# Reset wakeup&RTK timer cariables/variables
#*1200# ????
#*7200# Tone Generator Mute
#*3888# BLUETOOTH Test mode
#*#8999*324# ??
#*7828# Task screen
#*5111# ??
#*#8377466# S/W Version&H/W Version
#*2562# Restarts Phone
#*2565# No Blocking? General Defense.
#*3353# General Defense, Code Erased.
#*3837# Phone Hangs on White screen
#*3849# Restarts Phone
#*3851# Restarts Phone
#*3876# Restarts Phone
#*7222# Operation Typ: (Class C GSM)
#*7224# !!! ERROR !!!
#*7252# Operation Typ: (Class B GPRS)
#*7271# CMD: (Not Available)
#*7274# CMD: (Not Available)
#*7337# Restarts Phone (Resets Wap Settings)
#*2787# CRTP ON/OFF
#*2886# AutoAnswer ON/OFF
#*3737# L1 AFC
#*5133# L1 HO Data
#*7288# GPRS Detached/Attached
#*7287# GPRS Attached
#*7666# White Screen
#*7693# Sleep Deactivate/Activate
#*7284# L1 HO Data
#*2256# Calibration info? (For CMD set DEBUGAUTONOMY in cihard.opt)
#*2286# Databattery
#*2527# GPRS switching set to (Class 4, 8, 9, 10)
#*2679# Copycat feature Activa/Deactivate
#*3940# External looptest 9600 bps
#*4263# Handsfree mode Activate/Deactivate
#*4700# Please use function 2637
#*7352# BVMC Reg value (LOW_SWTOFF, NOMINAL_SWTOFF)
#*2558# Time ON
#*3370# Same as 4700
#*3941# External looptest 115200 bps
#*5176# L1 Sleep
#*7462# SIM Phase
#*7983# Voltage/Freq
#*7986# Voltage
#*8466# Old Time
#*2255# Call Failed
#*5187# L1C2G trace Activate/Deactivate
#*5376# DELETEALLSMS!!!!
#*6837# Official Software Version: (0003000016000702)
#*7524# KCGPRS: (FF FF FF FF FF FF FF FF 07)
#*7562# LOCI GPRS: (FF FF FF FF FF FF FF FF FF FF FF FE FF 01)
#*2337# Permanent Registration Beep
#*2474# Charging Duration
#*2834# Audio Path (Handsfree)
#*3270# DCS Support Activate/Deactivate
#*3282# Data Activate/Deactivate
#*3476# EGSM Activate/Deactivate
#*3676# FORMAT FLASH VOLUME!!!
#*4760# GSM Activate/Deactivate
#*4864# White Screen
#*5171# L1P1
#*5172# L1P2
#*5173# L1P3
#*7326# Accessory
#*7683# Sleep variable
#*8465# Time in L1
#*2252# Current CAL
#*2836# AVDDSS Management Activate/Deactivate
#*3877# Dump of SPY trace
#*7728# RSAV
#*2677# Same as 4700
#*3797# Blinks 3D030300 in RED
#*3728# Time 2 Decod
#*3725# B4 last off
#*7372# Resetting the time to DPB variables
#*7732# Packet flow context bit Activate/Deactivate
#*6833# New uplink establishment Activate/Deactivate
#*3273# EGPRS multislot (Class 4, 8, 9, 10)
#*7722# RLC bitmap compression Activate/Deactivate
#*2351# Blinks 1347E201 in RED
#*4472# Hysteresis of serving cell: 3 dB
#*2775# Switch to 2 inner speaker
#*9270# Force WBS
#*7878# FirstStartup (0=NO, 1=YES)
#*3757# DSL UART speed set to (LOW, HIGH)
#*8726# Switches USBACM to Normal
#*8724# Switches USBACM to Generator mode
#*8727# Switches USBACM to Slink mode
#*8725# Switches USBACM to Loop-back mode
#*3838# Blinks 3D030300 in RED
#*2077# GPRS Switch
#*2027# GPRS Switch
#*0227# GPRS Switch
#*0277# GPRS Switch
#*22671# AMR REC START
#*22672# Stop AMR REC (File name: /a/multimedia/sounds/voice list/ENGMODE.amr)
#*22673# Pause REC
#*22674# Resume REC
#*22675# AMR Playback
#*22676# AMR Stop Play
#*22677# Pause Play
#*22678# Resume Play
#*77261# PCM Rec Req
#*77262# Stop PCM Rec
#*77263# PCM Playback
#*77264# PCM Stop Play
