22. A mobile device, comprising: a dual-mode keypad for use in a text entry mode and a telephony mode, the dual-mode keypad comprising a plurality of dual-mode toggle keys displaying indicia of at least one telephony character and at least two text-entry characters, a plurality of single-mode keys displaying only indicia of at least one text-entry character, a key for switching between the text entry mode and the telephony entry mode, wherein the dual mode keypad provides two distinct ergonomics depending upon whether the device is in the text entry or telephony mode and text-entry characters of the dual-mode and single-mode keys are configured in a QWERTY-style arrangement on the mobile device; when the mobile device is in text-entry mode, the dual-mode toggle keys are configured to input the associated text-entry characters, the dual-mode toggle keys each inputting a first text-entry character when a first portion of the key is pressed and to input a second text-entry character when a second portion of the key is pressed; when the mobile device is in telephony mode, the dual-mode toggle keys are configured to input the associated telephony characters, the dual-mode toggle keys each inputting one of the associated telephony characters when any portion of the key is pressed, and the single-mode keys are not operable to input telephony characters in the telephony mode, wherein the dual mode keys are larger than the single mode keys.
22. A mobile device, comprising: a dual-mode keypad for use in a text entry mode and a telephony mode, the dual-mode keypad comprising a plurality of dual-mode toggle keys displaying indicia of at least one telephony character and at least two text-entry characters, a plurality of single-mode keys displaying only indicia of at least one text-entry character, a key for switching between the text entry mode and the telephony entry mode, wherein the dual mode keypad provides two distinct ergonomics depending upon whether the device is in the text entry or telephony mode and text-entry characters of the dual-mode and single-mode keys are configured in a QWERTY-style arrangement on the mobile device; when the mobile device is in text-entry mode, the dual-mode toggle keys are configured to input the associated text-entry characters, the dual-mode toggle keys each inputting a first text-entry character when a first portion of the key is pressed and to input a second text-entry character when a second portion of the key is pressed; when the mobile device is in telephony mode, the dual-mode toggle keys are configured to input the associated telephony characters, the dual-mode toggle keys each inputting one of the associated telephony characters when any portion of the key is pressed, and the single-mode keys are not operable to input telephony characters in the telephony mode, wherein the dual mode keys are larger than the single mode keys. 25. The mobile device of claim 22 , wherein each dual-mode toggle key includes a first switch that is engaged when the first portion of the key is pressed and a second switch that is engaged when the second portion of the key is pressed.