Eric Hautala, GM, Customer Experience Engineering blogged about the AT&T Windows Phone device update status yesterday. The post was updated later which reveals the two new AT&T unique features coming with NoDo update later this month.
 I forgot to mention the update we’ll be shipping to AT&T customers also includes support for two special AT&T features. The first is “WISPr†protocol support, which makes it possible for your phone’s data connection to automatically switch over to AT&T Wi-Fi hotspots when in range. The update also includes support for AT&T Address Book.
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Thanks to Pandi for the tip.