TmoNews have managed to lay their hands on another leaked T-Mobile USA roadmap.
The roadmap shows the Nokia Flame, which is due on the 24th April. The codename has been leaked earlier, and is supposed to be a low-end Windows Phone 8 handset, with a 4 inch screen, 512MB RAM, a 1.0GHz dual-core processor, 5-megapixel camera, and 4GB of storage with microSD expansion. The handset may be a variant of the Nokia Lumia 620.
Hopefully another more powerful Windows Phone handset will also show up on the carrier.