An uplink signaling method is described where the UE transmits an indication of its ability to maintain relative transmit phase continuity with respect to a plurality of transmit chains thereof in place of being required to actually maintain the phase difference between its transmitters. The signaling method utilizes straightforward signaling with very little overhead, because the indication may be provided by setting the value of a bit in an uplink transmission. In response, a base station adopts an uplink transmission format for communications by the UE based, at least in part, upon the received indication.