1. A mobile device having a telephony mode and a text-entry mode, comprising: a dual-mode keypad including a plurality of dual-mode keys having an associated telephony character and an associated text-entry character, wherein the text-entry characters are configured in a QWERTY-style arrangement on the mobile device; said dual-mode keypad further including one or more single-mode key, each key having at least one associated character and no other functions, and operable to input the at least one associated character when the mobile device is in either the telephony mode or the text-entry mode, but said single mode key is not operable in both modes; the dual-mode keys including one or more toggle keys, each toggle key having a plurality of associated text-entry characters and one associated telephony character; wherein the dual-mode keypad has two distinct ergonomics depending upon whether the device is in text-entry or telephony mode such that when the mobile device is in text-entry mode, the dual-mode keys provide a traditional keyboard text layout and are operable to input the associated text-entry characters, with the toggle keys each being operable to input a first text-entry character when a first portion of the toggle key is pressed and to input a second text-entry character when a second portion of the toggle key is pressed; and when the mobile device is in telephony mode, the dual-mode keys provide a traditional telephone keypad layout and are operable to input the associated telephony characters, the toggle keys each being operable to input one of the associated telephony characters when any portion of the toggle key is pressed; and further comprising a key for switching between the text entry mode and the telephony entry mode, wherein the dual-mode keys are larger than the single-mode keys.
1. A mobile device having a telephony mode and a text-entry mode, comprising: a dual-mode keypad including a plurality of dual-mode keys having an associated telephony character and an associated text-entry character, wherein the text-entry characters are configured in a QWERTY-style arrangement on the mobile device; said dual-mode keypad further including one or more single-mode key, each key having at least one associated character and no other functions, and operable to input the at least one associated character when the mobile device is in either the telephony mode or the text-entry mode, but said single mode key is not operable in both modes; the dual-mode keys including one or more toggle keys, each toggle key having a plurality of associated text-entry characters and one associated telephony character; wherein the dual-mode keypad has two distinct ergonomics depending upon whether the device is in text-entry or telephony mode such that when the mobile device is in text-entry mode, the dual-mode keys provide a traditional keyboard text layout and are operable to input the associated text-entry characters, with the toggle keys each being operable to input a first text-entry character when a first portion of the toggle key is pressed and to input a second text-entry character when a second portion of the toggle key is pressed; and when the mobile device is in telephony mode, the dual-mode keys provide a traditional telephone keypad layout and are operable to input the associated telephony characters, the toggle keys each being operable to input one of the associated telephony characters when any portion of the toggle key is pressed; and further comprising a key for switching between the text entry mode and the telephony entry mode, wherein the dual-mode keys are larger than the single-mode keys. 17. The mobile device of claim 1 , wherein the dual-mode keypad also includes one or more single-mode keys each with two associated text-entry characters, wherein a first text-entry character is input when a first portion of the single-mode key is pressed and a second text-entry character is input when a second portion of the single-mode key is pressed.