cell phone Handset Cheat Codes

Battery status & memory capacity *#9998*246#
Vibration test
*#9998*842#
or *#8999*842#
Ringtone test
*#9998*289#
China Mobile Secret
Codes:
Default User Code 1122,3344,1234,5676
Engineer mode
*#110*01#
Restore factory settings
*#987*99#