A mobile communication device comprising: an antenna configured to receive a first signal in a first frequency band and a second signal in a second frequency band; first receiver circuitry configured to receive signals in the first frequency band; a switch having a first position; and a first diplexing network coupled between the antenna, and the switch, wherein the first diplexing network is also coupled to the first receiver circuitry, wherein the first diplexing network is configured to pass the signals received in the second frequency band to the switch, wherein the mobile communication device further comprises a second diplexing network coupled to the switch at the first position, the second diplexing network corresponding to the second frequency band, the mobile communication device being characterized by: first transmitting circuitry coupled to the second diplexing network, the first transmitting circuitry configured to transmit signals in the first frequency band, wherein the second diplexing network is configured to diplex signals in the first frequency band transmitted by the first transmitting circuitry with signals received in the second frequency band, and wherein the first diplexing network, the second diplexing network, and the switch are configured to act in conjunction so that signals received in the first frequency band are presented with an open circuit after the switch such that the signals received in the first frequency band are reflected back to the first receiver circuitry. an antenna configured to receive a first signal in a first frequency band and a second signal in a second frequency band; first receiver circuitry configured to receive signals in the first frequency band; a switch having a first position; and a first diplexing network coupled between the antenna, and the switch, wherein the first diplexing network is also coupled to the first receiver circuitry, wherein the first diplexing network is configured to pass the signals received in the second frequency band to the switch, wherein the mobile communication device further comprises a second diplexing network coupled to the switch at the first position, the second diplexing network corresponding to the second frequency band, the mobile communication device being characterized by: first transmitting circuitry coupled to the second diplexing network, the first transmitting circuitry configured to transmit signals in the first frequency band, wherein the second diplexing network is configured to diplex signals in the first frequency band transmitted by the first transmitting circuitry with signals received in the second frequency band, and first transmitting circuitry coupled to the second diplexing network, the first transmitting circuitry configured to transmit signals in the first frequency band, wherein the second diplexing network is configured to diplex signals in the first frequency band transmitted by the first transmitting circuitry with signals received in the second frequency band, and wherein the first diplexing network, the second diplexing network, and the switch are configured to act in conjunction so that signals received in the first frequency band are presented with an open circuit after the switch such that the signals received in the first frequency band are reflected back to the first receiver circuitry.