Android Secret Codes

Android  IMP codes:
Cell Battery, WiFi Usage etc Info
*#*#4636#*#*
Restore Factory Settings
*#*#7780#*#*

Format Phone
*2767*3855#
Launch service mode
*#*#197328640#*#*
Test WiFi
*#*#232339#*#* or *#*#526#*#* or *#*#528#*#*
Display WiFi MAC address
*#*#232338#*#*
GPS test
*#*#1472365#*#*
Other GPS test
*#*#1575#*#*
Bluetooth test
*#*#232331#*#*
Display Bluetooth physic address
*#*#232337#*#
Start Gtalk monitoring
*#*#8255#*#*
PDA, Phone, H/W, RFCallDate
*#*#4986*2650468#*#*
PDA and Phone
*#*#1234#*#*
FTA SW version
*#*#1111#*#*
FTA HW version
*#*#2222#*#*
PDA, Phone, csc,
*#*#44336#*#*
Packet Loopback
*#*#0283#*#*
LCD test
*#*#0*#*#*
Melody test
*#*#0673#*#*
or
*#*#0289#*#*
Device test such as vibration and lightness
*#*#0842#*#*
Display touchscreen version
*#*#2663#*#*
Touchscreen test
*#*#2664#*#*
Distance sensor test
*#*#0588#*#*
Display memory version
*#*#3264#*#*