A power stage includes a power stage amplifier, selectable matching networks, and phase-change material (PCM) radio frequency (RF) switches. Each of the PCM RF switches includes a heating element transverse to a PCM, the heating element approximately defining an active segment of the PCM. A power stage amplifier output is connected to the PCM RF switches. Each of the PCM RF switches is connected to one of the selectable matching networks. A power stage amplifier output is coupled to or decoupled from one of the selectable matching networks by one of the PCM RF switches. In one approach, the power stage is included in a power amplifier module of a communications device. The power amplifier module further includes a bias and match controller that biases the power stage amplifier, and that uses one of the PCM RF switches to couple or decouple the power stage amplifier output.