Windows Phone Central has learned that AT&T is poised to grab the Nokia Lumia 925 and that it will be launching mid-September on the US carrier. The thin and sleek aluminum Lumia will reportedly be the black version and cost $99 on contract.  We have confirmed this information with two trusted sources.

The Nokia Lumia 920, currently sold on AT&T as an exclusive, will continue to be sold along the Lumia 925. However, its price should be dropping to $49 (from $99) on contract around the same time as the 925’s release (possibly even beforehand).

If proven to be accurate, and we have high confidence in this information, then it will be a turning point for AT&T as the carrier will have four Nokia phones, including the Lumia 520, Lumia 920 and the Lumia 1020 (the Lumia 820 has been slowly phased out due to low sales). It also solidifies AT&T’s position as the leading Windows Phone carrier in the US and its confidence in the Windows Phone platform.

The Nokia Lumia 925 features a thin, aluminum body with a polycarbonate back. In addition it has a 4.5-inch AMOLED display with Gorilla Glass 2 and a 8.7MP PureView rear camera. Featuring a 1.5GHz dual-core CPU, the device is in many ways identical to the Lumia 920 though it lacks Qi wireless charging.

We cannot currently verify the internal storage—whether it will be 16GB or 32GB—though we are leaning on the latter. [Update: We've heard from one source that it's 16GB] For now, readers can take a look at our Lumia 925 review (unlocked).

We expect to have more information on this launch and will bring it to you when we can.