A communication system includes a phone and a Subscriber Identity Module (SIM). The phone includes a user input interface, a first wireless transceiver and a first application program interface. The SIM is plugged into the phone and includes storage, a second wireless transceiver, and a second application program interface. The phone uses a service-subscriber key stored in the storage of the SIM to access a plurality of services provided by a wireless network using the first transceiver according to a first communication protocol. The first application program interface, in response to a user selection via the user input interface, interacts with the second application program interface. The phone communicates with a node using the second wireless transceiver according to a second communication protocol by way of the interaction between the first application program interface and the second application program interface.