I tried on my desktop. The app just says "The device doesn't support Miracast, so you can't project to it wirelessly."
Haven't received the update on my T-Mobile 640 either.
From what I remember the carrier's WIFI calling app will not work on unlocked phones, only on carrier branded phones. For me this alone will prevent me from buying another Lumia phone. If people...
For me it is just two steps back. Useless app to me now unless they restore the other functionality.
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