Phone calls super clear suddenly

[D.T.]

Funny you mentioned this: I called my wife yesterday (which is actually rare as we're usually home together or just message), and it was incredibly clear, not sure if it defaulted to FTA (since we're both on iPhones), or something to do with LTE voices services, or just better call quality with the S models.

 

[atrevers]

It's probably HD Voice - see here:

http://www.att.com/esupport/article.jsp?sid=KB425890&cv=820

I have it in the UK on Three (had it since iPhone 5), only works on calls to the same network though (not sure if that restriction applies universally).

 

[Newtons Apple]

Same here. I thought it was my new 6S+ but I have talked to several other ATT users and they say the same. Pretty awesome quality.

 

[btrach144]

Talked to my parents the other day with my new 6s. They both have the 6 and it was super clear. I verified that we both had VoLTE enabled and that we both live in VoLTE coverage areas. It's an awesome feature!