Not sure when AT&T is going to update that amazing price of $49 for Lumia 520, but MS store has already started selling Lumia 520 for $49 and this is valid till 2nd of December.
There are many more new offers like, Lumia 521 prepaid for just $79 (T-Mobile) and get $100 off on signing a new contract on Lumia 1020, 1520 and Samsung Ativ S Neo.
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