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		samsung all sevice code 
		ai chua có hoặc chua biết thì tham khảo , có lẽ đã cũ nhưng phục vụ anh em mới vào nghề
 *2767*688# = Unlocking Code
 *#8999*8378# = All in one Code
 *#4777*8665# = GPSR Tool
 *#8999*523# = LCD Brightness
 *#8999*3825523# = External Display
 *#8999*377# = Errors
 #*5737425# = JAVA Something{I choose 2 and it chrashed}
 *#2255# = Call List
 #*536961# = Java Status Code
 #*536962# = Java Status Code
 #*536963# = Java Status Code
 #*53696# = Java Status Code
 #*1200# = AFC DAC Val
 #*1300# = IMEI
 #*1400# = IMSI
 #*2562# = ??? White for 15 secs than restarts.
 #*2565# = Check Blocking
 #*3353# = Check Code
 #*3837# = ??? White for 15 secs than restarts.
 #*3849# = ??? White for 15 secs than restarts.
 #*3851# = ??? White for 15 secs than restarts.
 #*3876# = ??? White for 15 secs than restarts.
 #*7222# = Operation Typ (Class C GSM)
 #*7224# = I Got !! ERROR !!
 #*7252# = Oparation Typ (Class B GPRS)
 #*7271# = Multi Slot (Class 1 GPRS)
 #*7274# = Multi Slot (Class 4 GPRS)
 #*7276# = Dunno
 #*7337# = EEPROM Reset (Unlock and Resets Wap Settings)
 #*2787# = CRTP ON/OFF
 #*3737# = L1 Dbg data
 #*5133# = L1 Dbg data
 #*7288# = GPRS Attached
 #*7287# = GPRS Detached
 #*7666# = SrCell Data
 #*7693# = Sleep Act/DeAct (Enable or Disable the Black screen after doing nothing for a while)
 #*7284# = Class : B,C or GPRS
 #*2256# = Calibration Info
 #*2286# = Battery Data
 #*2527# = GPRS Switching (set to: class 4, class 8, class 9 or class 10)
 #*2679# = Copycat feature (Activate or Deactivate)
 #*3940# = External loop test 9600 bps
 #*4263# = Handsfree mode (Activate or Deactivate)
 #*4700# = Half Rate (Activate or Deactivate)
 #*7352# = BVMC Reg value
 #*8462# = Sleeptime
 #*2558# = Time ON
 #*3370# = EFR (Activate or Deactivate)
 #*3941# = External looptest 115200 bps
 #*5176# = L1 Sleep
 #*7462# = SIM phase
 #*7983# = Voltage/Frequenci (Activate or Deactivate)
 #*7986# = Voltage (Activate or Deactivate)
 #*8466# = Old time
 #*2255# = Call ???
 #*5187# = L1C2G trace (Activate or Deactivate)
 #*5376# = ??? White for 15 secs than restarts.
 #*6837# = Official Software Version
 #*7524# = KCGPRS
 #*7562# = LOCI GPRS
 #*7638# = RLC allways open ended TBF (Activate or Deactivate)
 #*7632# = Sleep mode Debug
 #*7673# = Sleep mode RESET
 #*2337# = Permanent Registration Beep
 #*2474# = ???
 #*2834# = Audio Path
 #*3270# = DCS support (Activate or Deactivate)
 #*3282# = Data (Activate or Deactivate)
 #*3476# = EGSM (Activate or Deactivate)
 #*3676# = Flash volume formated
 #*4760# = GSM (Activate or Deactivate)
 #*4864# = Dunno doesn't work on newer versions
 #*5171# = L1P1
 #*5172# = L1P2
 #*5173# = L1P3
 #*7326# = Accessory (I got Vibrator)
 #*7683# = Sleep variable (
 #*7762# = SMS Brearer CS (Activate or Deactivate)
 #*8465# = Time in L1
 #*9795# = wtls key
 #*2252# = Current CAL
 #*2836# = AVDDSS Management (Activate or Deactivate)
 #*3877# = Dump of SPY trace
 #*7728# = RSAV done# (Everything went to standart but nothing was deleted)
 #*2677# = ARM State (None or Full Rate)
 *#8999*636# = Have no clue what it is, i see 20 lines
 *#9999# = Software version
 *#8999*8376263# = HW ver, SW ver and Build Date
 *#8888# = HW version
 *#8377466# = Same HW/SW version thing
 *#7465625# = Check the locks
 *7465625*638*Code# = Enables Network lock
 #7465625*638*Code# = Disables Network lock
 *7465625*782*Code# = Enables Subset lock
 #7465625*782*Code# = Disables Subset lock
 *7465625*77*Code# = Enables SP lock
 #7465625*77*Code# = Disables SP lock
 *7465625*27*Code# = Enables CP lock
 #7465625*27*Code# = Disables CP lock
 *7465625*746*Code# = Enables SIM lock
 #7465625*746*Code# = Disables SIM lock
 *7465625*228# = Activa lock ON
 #7465625*228# = Activa lock OFF
 *7465625*28638# = Auto Network lock ON
 #7465625*28638# = Auto Network lock OFF
 *7465625*28782# = Auto subset lock ON
 #7465625*28782# = Auto subset lock OFF
 *7465625*2877# = Auto SP lock ON
 #7465625*2877# = Auto SP lock OFF
 *7465625*2827# = Auto CP lock ON
 #7465625*2827# = Auto CP lock OFF
 *7465625*28746# = Auto SIM lock ON
 #7465625*28746# = Auto SIM lock OFF
 *2767*3855# = E2P Full Reset
 *2767*2878# = E2P Custom Reset
 *2767*927# = E2P Wap Reset
 *2767*226372# = E2P Camera Reset
 #*6420# = MIC Off
 #*6421# = MIC On
 #*6422# = MIC Data
 #*6428# = MIC Measurement
 #*3230# = Trace enable and DCD disable
 #*3231# = Trace disable and DCD enable
 #*3232# = Current Mode
 #7263867# = RAM Dump (On or Off)
 *2767*49927# = Germany WAP Settings
 *2767*44927# = UK WAP Settings
 *2767*31927# = Netherlands WAP Settings
 *2767*420927# = Czech WAP Settings
 *2767*43927# = Austria WAP Settings
 *2767*39927# = Italy WAP Settings
 *2767*33927# = France WAP Settings
 *2767*351927# = Portugal WAP Settings
 *2767*34927# = Spain WAP Settings
 *2767*46927# = Sweden WAP Settings
 *2767*380927# = Ukraine WAP Settings
 *2767*7927# = Russia WAP Settings
 *2767*30927# = GREECE WAP Settings
 *2767*73738927# = WAP Settings Reset
 *2767*49667# = Germany MMS Settings
 *2767*44667# = UK MMS Settings
 *2767*31667# = Netherlands MMS Settings
 *2767*420667# = Czech MMS Settings
 *2767*43667# = Austria MMS Settings
 *2767*39667# = Italy MMS Settings
 *2767*33667# = France MMS Settings
 *2767*351667# = Portugal MMS Settings
 *2767*34667# = Spain MMS Settings
 *2767*46667# = Sweden MMS Settings
 *2767*380667# = Ukraine MMS Settings
 *2767*7667#. = Russia MMS Settings
 *2767*30667# = GREECE MMS Settings
 *335# = Delete all MMS Messages
 *663867# = Dump Mm file
 #*536961# = WAPSAR enable / HTTP disable
 #*536962# = WAPSAR disable / HTTP enable
 #*536963# = Serial eable / Others disable
 #*53696# = Java Download Mode
 #*5663351# = Wap Model ID [Your Model]
 #*5663352# = Wap Model ID [SEC-SGHXXXX/1.0]
 #*566335# = Wap Model ID [SEC-SGHXXXX/1.0]
 *2767*66335# = Check on which model it is
 *2767*7100# = SEC-SGHS100/1.0
 *2767*8200# = SEC-SGHV200/1.0
 *2767*7300# = SEC-SGHS300/1.0
 *2767*7650# = Nokia7650/1.0
 *2767*2877368# = Reset WAP Model ID to standart