ANDROID SECRET CODES
  *#*#778O#*#* = Factory Data Reset
    *#*#I472365#*#* = Starts a Quick GPS Test
    *#*#0673#*#* OR *#*#0289#*#* = Starts Audio Test
    *#*#2664#*#* = Starts Touch Screen Test
    #’#273283*255*663282*#*#* = Backup Media Files
    *#*#0283#*#* = Starts Packet Loopback Test
    *2767*3855# = Reinstalls The Phones Firmware & Format Your Phone
    *#*#232339#*#* OR *#*#526#*#* = Starts Wireless LAN Test
    *#*# 1575#*#* = Starts Different GPS Tests
    *#*#4636#*#*‘ = Shows Complete Information About Your Phone
    *#*#2663#*#* = Shows Touch Screen Version
    *#*#232337#*# = Displays Bluetooth Device Address
    *#*#4986*2650468#*#* = Shows PDA, Phone Hardware, RF& Call Date
    *#*#44336#*#* = Displays Build Time
    *#06# = Displays IMEI Number
    *#*#8255#*#* = Google Talk Service Monitoring
    *#*#I II I#*#* | *‘#*#2222#*#* = Shows FTA Software Version & FTA Hardware Version
    *#*#3264#*#* = Shows ROMVersion
    *#*#23233I#‘*#* = Starts Bluetooth Test
    *#*# 1234#’#’ = Shows PDA & Phone Firmware Information
    *#*#0*#*#*= Starts LCD Display Test
    *#*#0842#*#* Starts Vibration & Backlight Test
    *#*#0588#*#* = Shows Proximity Sensor Test
    *#*#232338#*#* = Shows Wi-Fi Mac Address
    *#*#7262626#*#*= Shows Field Test
    *#*#34971539#*#* = Shows Camera Update
    *#*#19732840#*#* = Enables Test Mode
    *#06# – Shows IMEI number
    *#0*# – Shows Service Menu (Galaxy S III + )
    *#*#4636#*#* – Shows Phone Information,Usage Statistics &Battery Information
    *#*#34971539#*#* – Shows Detailed Camera Information
    *#*#273282*255*663282*#*#* – Immediate Backup of AllMedia Files
    *#*#197328640#*#* – EnablesTest Mode For Service
    *#*#232339#*#* – Wireless LAN Tests
    *#*#0842#*#* – Backlight & Vibration Test
    *#*#2664#*#* – Touch Screen Test
    *#*#1111#*#* – FTA Software Version (if 1111 does not work try 1234)
    *#12580*369# – Software &Hardware Information
    *#9090# – Diagnostic Configuration
    *#872564# – USB Logging Control
    *#9900# – System Dump Mode
    *#301279# – HSDPA/HSUPA Control Menu
    *#7465625# – ViewsPhone Lock Status
    *#*#7780#*#* – Resets The Data Partition To Factory State
    *2767*3855# – FormatsDevice to Factory State (will delete everything on phone)
    ##7764726 – Hidden Service Menu (forsome Motorola Droid series)
    *#*#7594#*#* – EnablesDirect Powering Down of Device (once this code is entered)
    *#*#273283*255*663282*#*#* –Quick Backup of All The Media Files On Your Android Device
    *#*#232338#*#* – Shows Wi-Fi MAC Address
    *#*#1472365#*#* – Performs a Quick GPS Test
    *#*#1575#*#* – For a More Advanced GPS Test
    *#*#0283#*#* – Performs a Packet Loopback Test
    *#*#0*#*#* – Runs a LCD Display Test
    *#*#0289#*#* – Runsan Audio Test
    *#*#2663#*#* – ShowsDevice’s Touch Screen Version
    *#*#0588#*#* – Performs a Proximity Sensor Test
    *#*#3264#*#* – Shows RAM Version
    *#*#232331#*#* – Runs Bluetooth Test
    *#*#232337#*# – Shows device’s Bluetooth Address
    *#*#7262626#*#* – Performs a Field Test
    *#*#8255#*#* – Monitors Google Talk Service
    *#*#4986*2650468#*#* – Shows Phone, Hardware, PDA, RF Call Date & Firmware Information
    *#*#1234#*#* – Shows PDA & Phone Firmware Information
    *#*#2222#*#* – Shows FTA Hardware Version
    *#*#44336#*#* – Shows Build Time &Change List Number
    *#*#8351#*#* – Enables Voice Dialing Log Mode
    *#*#8350#*#* – Disables Voice Dialing Log Mode
    ##778 (+call) – Shows EPST Menu
    *#*#7594#*#* – EnablesDirect Powering Down of device once this code is entered
    *#*#232338#*#* – Shows Wi-Fi MAC Address

Specific Codes for HTC devices:-

    *#*#3424#*#* – Runs HTC Function Test Program
    ##786# – Reverse Logistics Support
    ##3282# – Shows EPST Menu
    ##3424# – RunsDiagnostic Mode
    *#*#8255#*#* – Launches Google Talk Service Monitor
    ##33284# – PerformsField Test
    ##8626337# – Runs VOCODER
    *#*#4636#*#* – Shows HTC Info Menu