4. The mobile device of claim 1 , wherein each toggle key includes a first switch that is engaged when the first portion of the toggle key is pressed and a second switch that is engaged when the second portion of the toggle key is pressed.
4. The mobile device of claim 1 , wherein each toggle key includes a first switch that is engaged when the first portion of the toggle key is pressed and a second switch that is engaged when the second portion of the toggle key is pressed. 5. The mobile device of claim 4 , wherein when the mobile device is in the text-entry mode, the first text-entry character is input by engaging the first switch and the second text-entry character is input by engaging the second switch.