hidden secret codes for android users

Hello visitors here is some secrets cods for android
Packet Loop Back Test =>*#*#0283#*#*Reset Factory Data =>*#*#7780#*#*Testing Touch Screen =>*#*#2664#*#*GPS Test =>*#*#1472365#*#*Audio Test =>*#*#0289#*#*Wireless Test =>*#*#232339#*#*Format your smartphone re- installs the firmaware =>*2767*3855#Info about your smartphone =>*#*#4636#*#*Enable Test Mode =>*#*#19732840#*#*Info about Touch Screen =>*#*#2663#*#*Field Test =>*#*#7262626#*#*Show Bluetooth device address =>*#*#232337#*#*Camera Update =>*#*#34971539#*#*Shows build time =>*#*#44336# *#*Displays Wi-Fi Mac Address =>*#*#232338#*#*Shows IMEI Number of your smartphone =>*#06#Test Proximity Sensor =>*#*#0588#*#*Google Talk Service Monitoring =>*#*#8255#*#*Test Vibration and Backlight =>*#*#0842#*#*ROM version =>*#*#3264#*#*Test LCD =>*#*#0*#*#*Test Bluetooth =>*#*#232331#*# *FTA Software and Hardware version=>*#*#2222# *#*PDA Phone, RF Call Date, Hardware=>*#*#4986*2650468#*#*Backup Media Files =>#*#273283*255*663282*#*#*just copy and dail in your dailer pad