1. A mobile device for displaying functions or characters, comprising: a display screen; a keyboard having keys, each key having associated indicia corresponding to at least one of alphabetic characters, numbers, and functions, wherein the keys associated with numbers or functions are operable for input of Dual-Tone Multi-Frequency (DTMF) codes, and wherein the alphabetic characters are arranged in a non-ITU Standard E.161 phone keypad layout; and a processor in signal communication with said keyboard and said display screen, said processor being configured to: receive an input for virtual keyboard representation; associate in response to said input a virtual keyboard corresponding to a portion of keys of said non-ITU Standard E.161 phone keypad layout; and cause said display screen to display a virtual ITU standard E.161 keypad layout representing said portion of keys in substantially the same size and shape as that of the non-ITU Standard E.161 portion of keys.