So did the other iPhone 5 on T-Mobile have the latest T-Mobile carrier update? Also, can you explain why it works on the iPhone 5 without AWS? Even T-Mobile states it does with the carrier update.
There's no restriction of HD Voice listed anywhere. People have gotten it to work on 4G. Just go to howardforums.com.
I never said it didnt work on the original iPhone 5, i even said it will most likely work with LTE on the original iPhone 5. It does not work on the original iphone when on t-mobiles Refarmed network. Thats not to say that they did not activate it on some of their refarmed network but in my location on their refarmed network HD Voice was not active.
I have had three iPhones all with the carrier update that did not use HDvoice. Once they were all exchanged for the AWS iphone 5 then that is when HD Voice was functional.