Upgrading an application software to be used, by communication

摘要

A communication device sends use status data representing a state of use thereof to an external communication device. Receiving the use status data, the external communication device sends the first-mentioned communication device a releasing signal to release the first-mentioned communication device from inhibition of fulfillment of a function stored beforehand. In response to the releasing signal, the first-mentioned communication device reads and fulfills the stored function.