As most observers are aware, Apple’s FaceTime application is currently enabled on AT&T’s popular Mobile Share plan as well as on Wi-Fi, though not at this time on our other billing plans. This approach has raised questions and some concerns. We decided to take this cautious approach for important reasons. AT&T has by far more iPhones on our network than any other carrier. We’re proud of this fact and the confidence our customers have in us. But it also means that when Apple rolls out new services or changes, as it did in iOS 6, it can have a much greater, and more immediate, impact on AT&T’s network than is the case with carriers who have far fewer iPhone users.
In this instance, with the FaceTime app already preloaded on tens of millions of AT&T customers’ iPhones, there was no way for our engineers to effectively model usage, and thus to assess network impact. It is for this reason that we took a more cautious approach toward the app. To do otherwise might have risked an adverse impact on the services our customers expect – voice quality in particular – if usage of FaceTime exceeded expectations. And this is important for all our customers regardless of which smartphone they may use.
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