Open your phone’s dialer and type the following code: *#197328640#*. In case it does not work for you, try this one: *#*#197328640#*#* . This will open the Service Mode menu on your Galaxy device. Select the option N. 2, that is “Version Info”. On the next screen, select ‘HW Version” (here HW means hardware). Now you will see another set of options on the next screen. Now tap on “Read CAL Date”, and bingo! You can now see the date of manufacture of your phone.
*#0**# LCD Screen test
*#06# Show IMEI Number
*#2222# HW Version
*#1234# Phone info/Firmware version
*#34971539# Camera Firmware settings
*#9900# Sysdump (Logfiles etc.)
*#0228# Battery diagnostics
*#7353# Function testing
*#9090# Service Mode
*#197328640# Service Mode Menu
*2767*3855# Factory Reset (not tested)
*#32489# -- (Ciphering Info)
*#4238378# GCF Configuration
??*#872564# USB Logging Control
??*#3214789650# LBS Test Mode
*#34971539# Camera Firmware Update
*#7412365# Camera Firmware Menu
*#301279# -- HSDPA/HSUPA Control Menu
73876766 SELLOUT SMS ENABBLE
738767633 SELLOUT SMS DISABLE
7387678378 SELLOUT SELF SET TEST MODE
7387677763 SELLOUT SMS SET PRODUCT MODE
4238378 GCF SETTINGS
4387264636 SELLOUT SMS MAIN
*#528# -- ?? Wireless Lan Tests
*#7465625# -- unlock? errors?
*#197328640# – Enabling test mode for service activity
**05***# – Execute from Emergency dial screen to unlock PUK code
??*#07# Test History
*#1234# View SW Version PDA, CSC, MODEM
*#03# -- NAND Flash S/N
*#80# -- Touchscreen noise test (warning do not press power button)
*#251# -- Wakelock ON
*#250# -- Wakelock OFF
*#350# -- Reboot
*#526# -- WLAN Engineering Mode
*#528# -- WLAN Engineering Mode
*#745# -- RIL Dump Menu
*#746# -- Debug Dump Menu
*#0011# -- ServiceMode [1]
*#0228# -- Battery status
*#0283# -- Audio packet loopback test
*#0289# -- Audio/speaker test (Melody Test Mode)
*#0514# -- SysDump (System Dumps, logs, etc)
*#0588# -- Proximity Sensor test
*#0589# -- Light Sensor Test Mode
*#0673# -- Audio/speaker test (same as 0289)
*#0782# -- Real Time Clock Test
*#0842# -- Vibration Test
*#1575# -- GPS Control Menu
*#2263# -- RF Band Selection
*#2663# -- Touchscreen FW and version
*#2664# -- HW touchscreen test
*#3264# -- RAM CHECK (Version number)
*#4327# -- HDCP INFO (True/ false)
*#7769# -- PROXIMITY SENSOR TEST
*#7284# -- Phone Utility (USB Settings)
*#7353# -- Self Test (Menu of 12 tests to use)
*#7594# -- Factory mode Enable shutdown on long press
*#8888# -- Service Mode (Read FTA hw version)
*#9900# -- System Dump Mode
*#9999# -- SW Versions (AP, CP, CSC, FTA SW)
*#22235# -- ACCELEROMETER SENSOR INFO
*#86824# -- TOUCH KEY SENSITIVITY
*#5238973# -- LCD TYPE
*#232331# -- BT test
*#232337# -- BT address
*#232338# -- WLAN MAC address & PS mode
*#232339# -- WLAN Engineering Mode test (TX & RX modes) (same 526)
*#272886# -- Auto Answer Selection
*#3214789# -- GCF Mode Status
*#8736364# -- OTA Update Menu
*#7412365# -- Camera Firmware Standard (Front/Rear Cam FW)
*#7465625# -- Personalization (Lock Status settings)
*#22558463# -- Reset Total Call Time
*#12580*369# -- Main Version (AP, CP, CSC, RF cal, HW Rev) (similar to 9999)
*#197328640# Service Mode
*#3282*727336*# -- System and Storage Information (Data Usage Status)
*#273283*255*3282*# -- Adjust/Fill Message, Contact, Call Log, etc Limits
*#273283*255*663282*# -- Data Create SD Card
*#7328735824# -- LOT ID