An apparatus comprises an external device for communication with an implantable device. The external device includes a communication circuit configured to receive a communication signal from at least one other device different from the implantable device, a locating circuit configured to determine a location of the external device using the received communication signal, and a control circuit electrically coupled to the communication circuit and the locating circuit. The control circuit is configured to determine whether the determined location imposes a limit on functionality of an implantable device, and provide user access to an implantable device feature according to the determined location.