A communication technique for establishing communication among an access point, an electronic device, and a radio node in a cellular-telephone network is described. In this communication technique, the electronic device is pre-provisioned by the radio node with an identifier of the cellular-telephone network. Moreover, the access point may advertise support for one or more LWA protocols in beacons. In response to a query from the electronic device, the access point may provide identifiers of the one or more cellular-telephone networks supported by the access point. If one of these identifiers matches the identifier, the electronic device may associate with the access point. Then, the access point may receive LWA traffic from the radio node and may forward the LWA traffic to the electronic device.