A user equipment device (UE) may be configured to collect first performance information from antennas of a first plurality of antennas. The first plurality of antennas may be coupled to a first radio of the UE that may be configured to perform wireless communications according to a first RAT. The UE may determine, based on at least the first performance information, a highest performing antenna of the first plurality of antennas to use for communications according to the first RAT. Additionally, the UE may determine, also based on at least the first performance information, a first antenna of a second plurality of antennas to use for communications according to a second RAT. The second plurality of antennas may be coupled to a second radio of the UE that may be configured to perform wireless communications according to the second RAT.