A multimedia messaging service (MMS) subsystem may include a user interface configured to allow a user to formulate an MMS message for delivery to a designated phone number; an oversized MMS message detection subsystem configured to detect when the formulated MMS message exceeds an allowable size limit; and an oversized MMS message management subsystem configured to divide an oversized MMS message into smaller MMS messages that are each within the allowable size limit and to cause each smaller MMS message to be delivered to the designated phone number/address. The MMS subsystem may be part of a wireless mobile communication device. Portions of the MMS subsystem may in addition or instead be part of a multimedia messaging service center (MMSC) server.