Implementations herein are directed toward operating the UE in a carrier aggregation mode, and when feasible, supporting MIMO communications on at least one of the CCs. For example, when the UE supports aggregation of two CCs and is limited to six RF chains, the UE may support a 2×2 MIMO antenna configuration (e.g., two MIMO spatial layers) on the first CC by allocating two of the RF chains to the first CC and support a 4×4 MIMO antenna configuration (e.g., four MIMO spatial layers) on the second CC by allocating the remaining four RF chains to the second CC. However, factors such as line of site and distance between the UE and a serving base station may affect whether or not it is suitable for the UE to support MIMO on one or both of the CCs. For instance, signal strength may be affected when an object or building obstructs a dominant communication path between the UE and the serving base station and/or as the UE moves further away from the serving base station. As a result, blindly allocating the transceiver resources across the CCs available for aggregation may result in one of the CCs not having enough RF chains (<2) when it is optimal for the UE to support a 4×4 MIMO antenna configuration on the corresponding CC. At the same time, another one of the CCs not attaining any benefit of operating in a MIMO antenna configuration may conversely have too many RF chains (>3), thereby leaving some RF chains unused that could have otherwise been allocated to the CC in need of additional RF chains to support the 4×4 MIMO configuration.