Ahead of Mobile World Congress 2013, two new Nokia Windows Phone devices, the Lumia 520 and 720, appear to have been leaked by the evleaks twitter account. Rumors of the two devices have floated around all month, including recently surfaced specs.

The Lumia 720 will reportedly pack a 4.3-inch screen with a 1GHz dual-core processor, 512MB of RAM, 8GB memory, dual cameras and microSD card slot. The 520 is rumored to ship with a 4-inch screen, 1GHz dual-core processor, 512MB of built-in storage, microSD card slot and a 5-megapixel rear camera, but will not have a front-facing camera.

Here’s the supposed Nokia Lumia 720:

 Nokias upcoming Lumia 520 and Lumia 720 Windows Phone handsets surface ahead of MWC

and the 520:

 Nokias upcoming Lumia 520 and Lumia 720 Windows Phone handsets surface ahead of MWC

While leaks such as these should be taken with a grain of salt, the evleaks twitter account has proved relatively accurate in the past and is worth watching.

Image credit: Spencer Platt / Getty Images