A device may connect to a first wireless network; determine whether the first wireless network provides a particular service for determining a position of the device; select the first wireless network as a primary network if the first wireless network provides the particular service for determining a position of the device, or select the second wireless network as the primary network if the first wireless network does not provide the particular service for determining a position of the device. If the device selects the first wireless network as the primary network, the device may send a first request to the first wireless network to make a first emergency call to an endpoint over the first wireless network.