The universal unlock code is *2767*637# do this without your sim in
By default, the firmware (software) for x600 only receives java apps and other applications like stuff by serial port.
but even for it, you have to enable the serial port, which also causes the closing of all other ports, even the IrDA too ..
well, guess what, i have very good news for you,
do you know, you can increase the sound level, the sound level for tones, speaker fone, etc, can be increase even then if it is at max (level 4) you still can do it,
just follows the instructions!

**************** HERE WE GO **************
Enter the following code:
*#8999*8378#
(You’ll be shown menu, then …)

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v200 Unlock Code-> *2767*7822573738#
*#9324# Netmon (press the hangup key to exit)
*#9998*JAVA# Edit GPRS/ CSD settings (S100 Only)
*#9998*Help# Help screen/ List of codes
*#9998*LOGO# Change operator Logo
*#9998*RTC# RTC Display
*#9998*Bat# Battery Status
*#9998*Buz# Turns Buzzer ON
*#9998*Vib# Turns Vibrator ON
*#9998*LCD# LCD Contrast
*#9998*9999# Softwre Version
*#9998*8888# Hardware Version
*#9998*377# NVM Error Log (?????)
*#9998*NET# SIM Network ID
*#9998*778# SIM Serv. Table
*#9998*SIM# SIM Info
*#9998*PN# Production No.
*#9998*968# Reminder Tune
*#9998*NVM# Displays Non-Volitile Memory Status
*#9999*C# ???????????????????
*#06# Displays phones I**I No.

*#9998*2576# Forces SIM Error
*#9998*DEAD# Forces Phone Crash
*2767*MEDIA# Resets the medis on the phone (deletes all downloaded
pics/tones)
*2767*FULL# Resets the EEPRON *DANGEROUS*
*2767*CUST# Resets the Custom EEPRON
*2767*JAVA# Resets JAV downloads (deletes all downloaded midlits)
*2767*STACKRESET# Resets Stack
*2767*225RESET# ????????????????? * Dangerous *
*2767*WAP# Resets WAP Setting & Deletes Favorites

Technorati Tags: samsung, V200, secret codes

*#06# -> Show IMEI
*#9999# -> Show Software Version
*#0001# -> Show Serial Parameters

*2767*3855# -> Full EEPROM Reset ( THIS CODE REMOVES SP-LOCK!!!! but also change IMEI to 447967-89-400044-0, you must use CHGIMEI to restore it)

*2767*2878# -> Custom EEEPROM Reset
*#8999*228# -> Battery status (capacity, voltage, temperature)
*#8999*246# -> Program status
*#8999*289# -> Change Alarm Buzzer Frequency
*#8999*324# -> Debug screens
*#8999*364# -> Watchdog
*#8999*377# -> EEPROM Error Stack
*#8999*427# -> Trace Watchdog
*#8999*523# -> Change LCD contrast
*#8999*544# -> Jig detect
*#8999*636# -> Memory status
*#8999*746# -> SIM File Size
*#8999*778# -> SIM Service Table
*#8999*785# -> RTK (Run Time Kernel) errors
*#8999*786# -> Run, Last UP, Last DOWN
*#8999*837# -> Software Version
*#8999*842# -> Test Vibrator
*#8999*862# -> Vocoder Reg
*#8999*872# -> Diag
*#8999*947# -> Reset On Fatal Error
*#8999*999# -> Last/Chk
*#8999*9266# -> Yann debug screen (=Debug Screens?)
*#8999*9999# -> Software version

Technorati Tags: samsung, secret codes, T100