Soft resetting your phone will restart your xda, ending running programs etc.
To soft reset your XDA2 by tap the reset button with your stylus (bottom left of phone near charger socket)
Hard resetting your xda2 will restore it to factory condition.
To hard reset xda2 insert stylus into reset hole and hold the power button.
Be sure to have fully backed up your phone before hard resetting your xda2