T-Mobile has launched a new promotional website for the Next Big Thing from Samsung, and the teaser image likely shows the upcoming Galaxy S6.

At the end of this week, on March 1, the HTC One M9 and the Samsung Galaxy S6, two of the most highly-anticipated devices of this year, will make their official debut at the Mobile World Congress (MWC) 2015.

The Samsung Galaxy S6 has leaked quite extensively as of late, and it's expected to boast notable improvements compared to its predecessors. Expectations are high especially when it comes to design, as the next-generation flagship smartphone from Samsung should come with a metal body.

While previous rumors left it rather unclear whether the Galaxy S6 would feature a full-metal design or just a metal frame, the latest teaser now reveals a metal back. More specifically, T-Mobile jumped the gun and launched a promo website for the Next Big Thing from Samsung, allowing interested consumers to sign up and receive more information when it becomes available.

The teaser image on T-Mobile's website shows the right side of the device, clearly revealing an edge screen similar to that of the Galaxy Note Edge. This bolsters previous claims that a Galaxy S6 Edge variant with a curved display is in the cards. At the same time, however, it remains unclear whether Samsung has two variants in store - a standard Galaxy S6 and a curved-display Edge version - or whether it plans to unveil just one flagship smartphone with a curved edge screen. Either way, the smartphone in this image seems to sport a full-metal design.

Previous rumors have also indicated that this upcoming smartphone from Samsung will have a dual-edge display, as opposed to the Galaxy Note Edge screen that curves just on one side.

T-Mobile's promotional website doesn't offer any other information regarding the specs of the device or other details, but it will all become official in less than a week.

Based on leaks so far, the next-generation Samsung Galaxy S6 should boast a Super AMOLED display with a QHD resolution of 2560 x 1440 pixels, a powerful Exynos processor, 3GB of RAM, a 20-megapixel rear camera, water resistance, a better fingerprint sensor, and more.

As previously mentioned, Samsung will unveil its latest and greatest at the Mobile World Congress 2015 on March 1, and we'll keep you up to date as soon as it's official.