Provided is an image processing apparatus provided with a module that holds identification information capable of specifying a subscriber who has entered a contract for specific mobile communication. The image processing apparatus provides, if software needs to be updated, a message indicating a predetermined time slot and that the image processing apparatus has to be in a state in which downloading software for updating using the specific mobile communication is possible, and downloads the software for updating in the predetermined time slot using the specific mobile communication. The predetermined time slot is at least a portion of a time slot which is determined depending on the contract for the specific mobile communication.