Systems and methods for Next Generation to Long Term Evolution (LTE) fallback are provided. An exemplary method includes detecting a request to set up a voice call originating from or terminating at a user equipment that is connected or configured to connect to a Next Generation mobile network; transitioning, in response to the request to set up the voice call, the user equipment from having a Next Generation mobile network connection with the Next Generation mobile network to having an LTE network connection with an LTE network, the detecting and the transitioning performed without call setup being performed for the voice call via the Next Generation mobile network; and performing call setup for the voice call via the LTE network connection with the LTE network.