Android secret codes

Android IMPORTANT secret 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#*#*