Nokia's Lumia 520 whilst not the most powerful or the most feature-packed Lumia device, is something of a success story, especially in markets such as India where it has been selling out. It is possible that this is due to its affordability, but in any case it looks like the phone could be close to launching in the US, thanks to a photo posted by @evleaks who teased the upcoming announcement by saying, "It's coming..." It is obviously the Lumia 520 due to the placement of the camera at the back, and it looks like it will be arriving on AT&T's network as the carrier's logo can be seen on the back the device as well.
Ubergizmo , Nokia Lumia 520 Could Be Headed For AT&T, Nokia Lumia 520 Could Be Headed For AT&T