A method of signaling device capabilities, the method performed by a wireless device of a wireless communication network and comprising: compiling one or more frequency band combinations supported by the wireless device, each frequency band combination comprising a plurality of frequency bands that the wireless device can use together for transmission or reception of wireless signals; compiling a set of device capabilities supported by the wireless device, wherein the set of device capabilities includes a cost associated with each device capability, the cost representing an amount of device processing power required to perform the capability; assembling a capability message, the capability message including: the one or more frequency band combinations supported by the wireless device; one or more combinations of the device capabilities supported by the wireless device on one or more bands of the one or more frequency band combinations; wherein, for each of the one or more frequency band combinations, the capability message further includes a first indication of one or more device capabilities supported by the frequency band combination, wherein the first indication of the one or more device capabilities supported by the frequency band combination comprises, for each band of the frequency band combination of the plurality of frequency bands, a further indication of one of the one or more combinations of the device capabilities supported by the band when used in combination with the other bands in the frequency band combination; and sending the capability message to a network node. compiling one or more frequency band combinations supported by the wireless device, each frequency band combination comprising a plurality of frequency bands that the wireless device can use together for transmission or reception of wireless signals; compiling a set of device capabilities supported by the wireless device, wherein the set of device capabilities includes a cost associated with each device capability, the cost representing an amount of device processing power required to perform the capability; assembling a capability message, the capability message including: the one or more frequency band combinations supported by the wireless device; one or more combinations of the device capabilities supported by the wireless device on one or more bands of the one or more frequency band combinations; wherein, for each of the one or more frequency band combinations, the capability message further includes a first indication of one or more device capabilities supported by the frequency band combination, wherein the first indication of the one or more device capabilities supported by the frequency band combination comprises, for each band of the frequency band combination of the plurality of frequency bands, a further indication of one of the one or more combinations of the device capabilities supported by the band when used in combination with the other bands in the frequency band combination; and sending the capability message to a network node. the one or more frequency band combinations supported by the wireless device; one or more combinations of the device capabilities supported by the wireless device on one or more bands of the one or more frequency band combinations; wherein, for each of the one or more frequency band combinations, the capability message further includes a first indication of one or more device capabilities supported by the frequency band combination, wherein the first indication of the one or more device capabilities supported by the frequency band combination comprises, for each band of the frequency band combination of the plurality of frequency bands, a further indication of one of the one or more combinations of the device capabilities supported by the band when used in combination with the other bands in the frequency band combination; and sending the capability message to a network node.