Portable cellular phone, portable cellular phone system, message format controlling method, and message format controlling program

摘要

A portable cellular phone is provided which is capable of transmitting a message corresponding to a terminal of a message receiver even in a case where any one or some of terminals of message receivers have a function of receiving a message of a MMS (Multimedia Message Service) format and any one or some of the terminals do not have the function. Terminal information indicating whether or not a message of the MMS format can be received is managed by a terminal information server. A telephone number or E-mail address and terminal type information corresponding to a name of the message receiver is stored by the portable cellular phone and terminal information is received via the Internet and updated periodically. Terminal type information corresponding to a name of the message receiver is read and a message of either of the SMS (Short Message Service) or MMS format is selected to create a message for transmission.