HD Voice Calling, all voice calls between CC phone Mobile Apps users are HD quality, making it should like the person on the other side is in the room with you. Once you hear HD-voice you will never want to make a regular voice call again. Our calls are internet-free. We use stable phone lines to connect your call which means you don’t have to worry about bad reception or dropping a call. Our low rates and stable phone lines lets us connect more than one billion calling minutes every year.