Android Factory Used secret Codes

These codes are commonly used in factories for the test purposes.

1. *#*#0283#*#* -> Packet Loop-back test.
2. *#*#0*#*#* -> LCD test.
3. *#*#0673#*#* -> Audio/Melody test.
4. *#*#0289#*#* -> Audio/Melody test
5. *#*#0842#*#* -> Vibration test and Back Light test Device test.
6. *#*#2663#*#* -> Displays Touch screen version.
7. *#*#2664#*#* -> Touch-Screen test.
8. *#*#0588#*#* -> Proximity sensor test.
9. *#*#3264#*#* -> RAM version.
10. *#0782# -> Real time clock test.
11. *#0589# -> Light sensor test.
12. *#7353# -> Quick test menu.