*#06# = IMEI Number.
*#1234# = Firmware Version.
*#2222# = H/W Version.
*#8999*8376263# = All Versions Together.
*#8999*8378# = Test Menu.
*#4777*8665# = GPSR Tool.
*#8999*523# = LCD Brightness.
*#8999*377# = Error Menu.
*#8999*327# = EEP Menu.
*#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.
#*7200# = Tone Generator Mute.
#*3888# = BLUETOOTH Test mode.
#*7828# = Task screen.
#*#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# = DELETE ALL SMS!!!!.
#*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.
#*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.
#*8370# = Tfs4.0 Test 0.
#*8371# = Tfs4.0 Test 1.
#*8372# = Tfs4.0 Test 2.
#*8373# = Tfs4.0 Test 3.
#*8374# = Tfs4.0 Test 4.
#*8375# = Tfs4.0 Test 5.
#*8376# = Tfs4.0 Test 6.
#*8377# = Tfs4.0 Test 7.
#*8378# = Tfs4.0 Test 8.
#*8379# = Tfs4.0 Test 9.
#*7878# = FirstStartup. (0=NO, 1=YES)
#*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.
#*22679# = AMR Get Time.
*#8999*364# = Watchdog ON/OFF.
*#8999*427# = WATCHDOG signal route setup.
*2767*226372# = Camera Reset. (deletes photos)
*2767*3855# = E2P Full Reset.
*2767*2878# = E2P Custom Reset.
*2767*927# = E2P Wap Reset.
*2767*226372# = E2P Camera Reset.
*2767*688# = Reset Mobile TV.
#7263867# = RAM Dump. (On or Off)
*#0*# = testing sensors and other stuff (thanks karfeef)
*#0011# = ServiceMode/Debug/Basic Information (thanks Croak)

Samsung mobile sound code.
Samsung phones.
Dial *#6984125*#
Test menu dial *#9072641*# (You need this one i think.)
Click 5 Audio – 2 AP volume config

Tune Headset volume:
*#9072641*# – 2 EAR config – 3 Ringtone volume – Stap 6 tune it to 10
Tune movie volume:
*#9072641*# – 3 SPK config – 3 Ringtone volume – Stap 6 tune it to 10