Techniques are disclosed for connecting third-party accessories to a cellular-capable device to participate in a telephone call. In one example, a user can voice a request to make a call to an accessory device. The accessory device can transmit the request to a controller device. Upon processing the request, the controller device can identify an appropriate cellular-capable device and instruct the cellular-capable device to place the requested call. The controller device can also instruct the cellular-capable device to establish an audio connection with the accessory device to relay the call audio. In another example, the controller device can listen for a word spoken at the accessory device indicating the end of the call. Upon receiving the end of call word, the controller device can instruct the cellular-capable device to terminate the call. While in the listening state, the controller device may continue processing user requests received at other accessory devices.