Secret Android Codes

Codes to launch various factory tests:

*#*#0283#*#* – Packet Loopback

*#*#0*#*#* – LCD test

*#*#0673#*#* OR *#*#0289#*#* – Melody test

*#*#0842#*#* – Device test (Vibration test and BackLight test)

*#*#2663#*#* – Touch screen version

*#*#2664#*#* – Touch screen test

*#*#0588#*#* – Proximity sensor test

*#*#3264#*#* – RAM version