Remember those 4G Windows Phone stickers back at the end of July that were printed to accompany future devices on display? Well now we know (at least one) device T-Mobile will have which will run Windows Phone and will be capable of 4G.
The image above is the HTC Radar, but for T-Mobile and under the name of T-Mobile HTC Radar 4G. The boot screen, TV application as well as the “About” screen clearly testify that the Radar, this Radar 4G, will be carried by T-Mobile. Heading over to the source link you’ll find plenty of more pictures of the phone, including the one where you can see the signal bar with the 4G label next to it.