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#*#*