A method of operating a communication device (1300, 1500) having a controller operatively connected to a plurality of transceivers (1301, 1305; 1503, 1505, 1511) co-located within the device including a first transceiver (1301, 1503) and a second transceiver (1305, 1507, 1511), wherein the first transceiver receives signals on one or more channels within a first frequency band and the second transceiver transmits signals on one or more channels within a second frequency band, wherein the first and second frequency bands are adjacent one another so that each of the first and second frequency bands has an adjacent border and a nonadjacent border (311, 313), the method comprising: operating the first and second transceivers concurrently in a frequency division multiplexing mode of operation whereby interference at the first transceiver caused by transmissions of the second transceiver is mitigated, at least in part, by means of filtering; the controller detecting (1401, 1601) which one or more channels of the second frequency band are being used by the second transceiver and based on an outcome of the detecting, performing: if any of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1403, 1405; 1603, 1605) one or more of a radio frequency, RF, band selective transmit filter of the second transceiver and a RF band selective receive filter of the first transceiver to create a first guard band that is located more in the first frequency band than in the second frequency band; if none of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1409, 1411; 1611, 1613) one or more of the transmit filter of the second transceiver and the receive filter of the first transceiver to create a second guard band that is located more in the second frequency band than in the first frequency band. operating the first and second transceivers concurrently in a frequency division multiplexing mode of operation whereby interference at the first transceiver caused by transmissions of the second transceiver is mitigated, at least in part, by means of filtering; the controller detecting (1401, 1601) which one or more channels of the second frequency band are being used by the second transceiver and based on an outcome of the detecting, performing: if any of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1403, 1405; 1603, 1605) one or more of a radio frequency, RF, band selective transmit filter of the second transceiver and a RF band selective receive filter of the first transceiver to create a first guard band that is located more in the first frequency band than in the second frequency band; if none of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1409, 1411; 1611, 1613) one or more of the transmit filter of the second transceiver and the receive filter of the first transceiver to create a second guard band that is located more in the second frequency band than in the first frequency band. if any of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1403, 1405; 1603, 1605) one or more of a radio frequency, RF, band selective transmit filter of the second transceiver and a RF band selective receive filter of the first transceiver to create a first guard band that is located more in the first frequency band than in the second frequency band; if none of the detected one or more channels of the second frequency band are adjacent the first frequency band, then adjusting (1409, 1411; 1611, 1613) one or more of the transmit filter of the second transceiver and the receive filter of the first transceiver to create a second guard band that is located more in the second frequency band than in the first frequency band.