Three UK has been talking about High Definition voice calls, which were launched on the network a couple of weeks ago. As with the Orange HD Voice service, which was rolled out last year, the service is only available between compatible phones in 3G coverage on the same network.
The company says hundreds of thousands of HD calls have already been made since it completed the rollout.
The Nokia C7, Nokia E7 and Nokia N8 currently support HD voice calls on Three, with other phones due to be added to the list later this year.
[Three blog]