Personal mobility, multiparty control, and device augmentation features are provided within a voice-over-Internet protocol environment, such as a distributed feature composition (DFC) telecommunications architecture. The personal mobility features allow a caller to be identified to a callee using a desired identifier in place of an identifier of the device from which a call is made. Such personal mobility features are made available in multiparty calling environments and after mid-call moves. Device augmentation features provide enhanced calling options to a device that may otherwise be unequipped to provide such options, thus enabling personal mobility and multiparty control features across a wide variety of telecommunications devices.