Credit to MacWorld UK for first pointing this out
T-Mobile UK launched HD voice support in August 2012. It slipped past the HD Voice News search filters and it appears the service provider didn’t make a formal press release on the matter.
Vision Mobile UK first reported the news on August 9, 2012, with a brief post noting that T-Mobile’s network has over 450,000 existing customers with HD voice phones. It also notes T-Mobile and Orange customers can exchange HD voice calls.
This announcement also didn’t hit the Global mobile Supplier Association’s most recent report, so the editorial staff is feeling a little bit less red-faced.