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#*#*