In one embodiment a mobile client includes a first voice interface configured to communicate voice media via a first radio technology. A second voice interface is configured to communicate voice media via a second radio technology, which is different from the first radio technology. A data interface can communicate data via at least one of the first radio technology and the second radio technology. Call control is programmed to control the data interface to perform signaling from the mobile client for establishing parameters for a voice media session between the mobile client and a third party via a selected one of the first voice interface and the second voice interface The call control controls the signaling from the mobile client depending on which of the first voice interface and the second voice interface the call control determines to utilize for the voice media session.