An enhanced GaN transistor is provided. More particularly, an eMBMS bearer may be established to support a group call based on a mapping among eMBMS network components that service a geographic area selected by an originator associated with the group call. The liquid metal micro-switches can be integrated directly into the construction of shielded thick film microwave modules. In one aspect, at least one of firing events in a skip fire firing sequence, and dynamically determined valve actuation events are used in the control of the camshaft phase during operation of the engine. Circuitry for establishing a close loop with a motor may be positioned in a control head in the system or in a power module in the system.