Android 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#*#*