blackberry

Soft Reset
If you can't sync your BlackBerry with your PC (device not detected), then you can make use of the following key combination to perform a soft reset:

    Press the following keys simultaneously: ALT+DELETE+RIGHT SHIFT.
    The screen will go blank and from there let the device start normally.


Hard Reset

    You can use a hard reset when your applications/device are not working properly.
    This is achieved using the same key combination as above:
        ALT+DELETE+RIGHT SHIFT.
    But this time you will have to use it twice.
    On the first attempt the Blackberry screen will turn blank and will light up.
    Upon this use the same key combination again (ALT+DELETE+RIGHT SHIFT.), you should get a blank screen followed by an hour glass.
    Let the device boot normally and it should be OK.