The carrier isn't as gung-ho about bringing voice over WiFi as its competitors
According to the reports, the WiFi calling is coming to AT&T in 2015 but it seems as if this just isn’t on their agenda or top priority list right now as opposed to the rest of the carriers and all this despite its huge footprint of unlicensed spectrum. AT&T has had an impressive history with Wi-Fi and it was the market leader in this segment in the US and among all other carriers, AT&T has had no problem at all in maintaining the biggest footprint of access points. However, the president and CEO of AT&T's new Mobile and Business Solutions group, Ralph de la Vega doesn’t think that the Wi-Fi calling feature needs to be on the priority list and there would be enough time in the future to offer Wi-Fi calling capabilities.
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While he spoke at the Goldman Sachs Communacopia Conference on Friday he was of the view that Wi-Fi calling would be used by the company in 2015 but that would only be as a complement to voice-over-LTE and 3G voice. He said "We're very focused on making sure it's a great experience for customers, but we see it as a complement, not a replacement. We feel good about a great nationwide network with unlimited talk and text."
On the other hand, other carriers are giving a lot of importance to the Wi-Fi calling services including T-Mobile US Inc. that has just dedicated its entire "Un-carrier 7.0" launch event to talking up its voice-over-WiFi calling capabilities which is going to ensure coverage indoors and in areas where its LTE network doesn't reach.