This picture is coming from @evleaks. It says “it is coming…” showing a device which looks like Lumia 520 with an AT&T logo on the back. So apparently we are going to see this low end Lumia phone seeking on AT&T soon.
Very good move by Nokia I’d say. This is already the best selling Lumia phone in the Asia. On AT&T, it would give consumers (the iPhoners and Android users mostly) an option to try out Windows Phones by not paying more. And ofcourse, it would work as a bridge for the users to move on to the higher end Lumia phones to get more features.