Bada Codes

• *2767*3855# -> Factory reset code
• *#197328640#-> Service mode
• *#0228#-> Phone Battery
  
• *#7465625#-> Used to check the status of SIM lock, Network LOCK,etc.
  

Firmware Information Codes

• *#4986*2650468# -> SW Version, HW Version, MP, RF Cal Date, CSC Version, CSC Model Spec, FFS Version, RC2 Version
• *#1234# -> SW Version and CSC Version
• *#1111# -> FTA SW Version
• *#2222# -> FTA HW Version

Wifi And Bluetooth Setting Codes

• *#526# -> Wi-Fi Manual MFG Test Mode
• *#232337# -> BT RF Test Mode

Codes For Various Factory Tests

• *#0*# -> Full test menu
• *#0673# OR *#0289# -> Melody test
• *#0842# -> Vibration test
• *#2663# OR *#2664# -> TM Command

GPS menu Code

• *#4097*4097#-> GPS menu

Warning:I dont take any responsibility for any sort of damage to your phone by using these codes

Thanks to Roxyroot from XDA-Developers Forum