A removable computer chip module for use in a communication unit is disclosed. The communication unit also includes a transceiver, an interface in communication with the removable computer chip module, and a controller in communication with the interface. The controller configured to receive a first access number stored on the removable computer chip module. The controller is further configured to control a transceiver in the communication unit such that the transceiver transmits the first access number to access a cellular network and receives a second access number. The controller is further configured to control the transceiver such that the transceiver transmits the second access number to the cellular network for subsequent access to the cellular network. The controller is further configured to receive count information associated with calls from the removable computer chip module.