Blackbery : Device self test application‏

Device self test application : The Blackberry self-test will test your keyboard and trackball , misc , handset audio , headset audio , bluetooth audio , RF components , GPS , camera , SD card , SD card insert remove

How to run this application
1. select options from the home screen and then select status.
2. on the status screen type in the word "test".
3. the menu on the device self-test application screen , select start.