Abstract: A mobile terminal device includes: a display surface; a display control module that displays on the display surface a first input screen with a plurality of character keys which input characters and a second input screen having larger intervals between at least some of adjacent character keys than intervals between all of adjacent character keys of the first input screen, in a switchable manner between the two input screens; and a delete key for deleting a character input by the character key. In this arrangement, the display control module executes control for changing the first input screen to the second input screen based on fulfillment of a condition for changing including deletion of a character by the delete key when the first input screen is displayed on the display surface.

Abstract: A cellular phone includes a display surface, a touch sensor configured to accept an input with respect to the display surface and a CPU. The CPU displays a keyboard for inputting characters, an input text and a send button for executing a function for sending the input text as a message on the display surface. Further, the CPU executes a suppressing control for suppressing the execution of the function for sending the text as the message while one or more undetermined characters are included in the text displayed on the display surface.