*#0*# Enter the service menu { I personally love to use this one }
*#*#4636#*#* Phone information, usage statistics and battery
*#*#34971539#*#* Detailed camera information
*#*#273282*255*663282*#*#* Immediate backup of all media files
*#*#273283*255*663282*#*#* File copy screen (backup media files)
*#*#197328640#*#* Enable test mode for service
*#*#232339#*#* Wireless LAN tests
*#*#232338#*#* Shows wifi mac address
*#*#0842#*#* Backlight/vibration test
*#*#2664#*#* Test the touchscreen
*#*#1111#*#* FTA software version
*#*#1234#*#* PDA and firmware version
*#12580*369# Software and hardware info
*#9090# Diagnostic configuration
*#872564# USB logging control
*#9900# System dump mode
*#301279# HSDPA/HSUPA Control Menu
*#7465625# View phone lock status
*#*#7780#*#* Reset the /data partition to factory state
*2767*3855# Format device to factory state
(deletes everything on phone)
*#*#7594#*#* Change end call/power option
*#*#526#*#* WLAN test
*#*#232331#*#* Bluetooth test
*#*#232337#*# Shows bluetooth device address
*#*#8255#*#* Gtalk service monitor
*#*#0283#*#* Packet loopback
*#*#0*#*#* LCD test
*#*#0673#*#* Melody test
*#*#0842#*#* Device test (vibration test and backlight test)
*#*#2663#*#* Touch screen version
*#*#0588#*#* Proximity sensor test
*#*#3264#*#* RAM version
*#*#4986*2650468#*#* pda, phone, h/w, RFCallDate
*#*#2222#*#* fta hw version
*#*#44336#*#* pda, phone, csc, build time, changelist number