Systems and methods for dynamic access network slice switching and carrier aggregation include a radio access network (RAN) and user devices with dual radio user equipment. The RAN receives a 4G and a 5G service request from user equipment having a specified priority. A first RAN slice for the 4G and 5G service request is instantiated using a RAN scheduler. A temporary radio resource control protocol slice having an associated timer that allows the dual radio user equipment to stay connected to the RAN for a period of time is then instantiated. Instructions identifying an appropriate resource and RAN slice for complying with user plane service level agreement requirements are received at the RAN and a second RAN slice for instantiating a carrier aggregation slice comprising both the 4G and 5G radio resource control protocol request for complying with the user plane service level agreement requirement is engaged.