Patent ID: 8208958

Claim:
A cellular mobile device comprising: a handset portion having a processor that facilitates communication with one or more cellular network systems, each cellular network system providing wireless communication for the cellular mobile device, and further having a first antenna for communication over at least a first cellular network system of the one or more cellular network systems; a cartridge removably coupled to the handset portion through an interface, the cartridge including a radio frequency (RF) or baseband processing subsystem and a second antenna for communication over a second cellular network system of the one or more cellular network systems; a service selection processing component executable by at least one of the handset and the cartridge and operable to utilize either the first or second cellular network system and to select the first antenna of the handset or the second antenna resident in the installed cartridge depending on one or more operational parameters and the utilized cellular network system; and a unitary housing, wherein the interface comprises one of a plurality of interfaces provided through a slot in the unitary housing, the slot configured to accommodate a respective cellular device cartridge of a plurality of different modular cellular device cartridges, wherein each of the different modular cellular device cartridges supports a different cellular network system.