I am trying to get AT&T Wi-Fi calling working on my iPhone. When I am at my office and connect to wi-fi, the AT&T Wi-Fi Calling option is present, but when I come home and connect to my Buffalo WXR9300BE6P it never switches to Wi-Fi calling mode. Based on this, I am guessing it has something to do with my router settings. I have OCN / NTT Flets Hikaru Cross if that matters.
Does anyone else have the same problem or know how to fix it? I found this link but I have no idea what do in the router configuration screen.
by feijaocozido