These are one of the best tricks if you want to know if the SAMSUNG S3 UNIT is original even without PC.
Entering Recovery & Download Modes
How to get into Recovery Mode
- Unplug the USB cable.
- Shut down the phone.
- Hold down the 'HOME' + 'VOLUME UP' buttons and press the 'POWER' button for about 5 seconds to enter Recovery Mode.
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How to get into Download Mode (eg: for Odin)
- Unplug the USB cable.
- Shut down the phone.
- Hold down the 'HOME' + 'VOLUME DOWN' buttons and press the 'POWER' button for about 2 seconds until a WARNING! Screen appears. Press the 'VOLUME UP' button to enter Download Mode.
- To get out of Download Mode, simply press and hold the power button until the phone restarts.
In my opinion there is no ODIN DOWNLOAD MODE in S3 clones.
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Different SAMSUNG CODES
*#*#4636#*#* - Phone Information
*2767*3855# - Hard Reset
*#*#7780#*#* - Factory Reset
*#*#7594#*#* - Change End Call/Power Option
*#*#197328640#*#* - Service Mode 1
*#2263# - Service mode 2
*#*#273283*255*663282
*#*#* - File Copy Screen (Backup Media Files)
*#*#526#*#* - WLAN Test
*#*#232338#*#* - Shows WiFi MAC address
*#*#1472365#*#* - GPS Test
*#*#1575#*#* - Another GPS test
*#*#232331#*#* - Bluetooth test
*#*#232337#*# - Shows Bluetooth device address
*#*#8255#*#* - GTalk Service Monitor
Codes to launch various Factory Tests:
*#*#0283#*#* - Packet Loopback
*#*#0*#*#* - LCD test
*#*#0673#*#* - Melody test
*#*#0842#*#* - Device test (Vibration test and BackLight test)
*#*#2663#*#* - Touch screen version
*#*#2664#*#* - Touch screen test
*#*#0588#*#* - Proximity sensor test
*#*#3264#*#* - RAM version
Codes to get Firmware version information:
*#*#4986*2650468#*#* - PDA, Phone, H/W, RFCallDate
*#*#1234#*#* - PDA and Phone
*#*#1111#*#* - FTA SW Version
*#*#2222#*#* - FTA HW Version
*#*#44336#*#* - PDA, Phone, CSC, Build Time, Changelist number
*#272*IMEI# - To change the salescodes and reset the user data (by blade2011)
*#*0*# - general test (by lovetz)
*#272*IMEI# To change the salescodes and reset the user data
