1. AirTies 4920: To take full advantage of our Wi-Fi gateway mesh network which expands the coverage range, you’ll have to use an AT&T AirTies 4920. Non-AT&T AirTies won’t be able to take full advantage of all the features of AT&T’s Smart Home Network and the Smart Home manager app. AT&T-branded AirTies 4920 won’t work as a mesh network with non-AT&T branded Wi-Fi gateways or with third-party internet services.