Pictured: Employees are reflected on a logo of Samsung C&T Corp at the company's headquarters in Seoul, July 16, 2015. Reuters/Kim Hong-Ji

Samsung is rumored to announce its next flagship smartphones, the Galaxy S7 and the Galaxy S7 Edge on Feb. 21, just before the start of Mobile World Congress 2016. Compared to previous release patterns of the Galaxy S smartphones, Samsung is poised to release the Galaxy S7 and the S7 Edge early in 2016. Rumors have it that AT&T is already testing both the handsets that indicate that the early release of the devices is imminent.

According to the popular leakster, @evleaks, AT&T is already testing the Galaxy S7 and the S7 Edge with respective model numbers SM-G930A and SM-G935A. Hence, it is likely that Samsung may release both the handsets in the U.S. soon after their announcement, Phone Arena reported. The leakster did not reveal any information on the specifications of the Galaxy S7 and S7 Edge smartphones.

Previous rumors suggested that Samsung may announce the Galaxy S7 in January. However, another tipster @Ricciolo1 has revealed on Twitter that Samsung will be holding the Unpacked 2016 event on Feb. 21 in Barcelona. The Mobile World Congress event will begin on the following day on Feb. 22 through Feb. 25.

Speculations are rife that the Samsung Galaxy S7 will be available in three chipset variants, namely Exynos 8890 from Samsung, Snapdragon 820 from Qualcomm and Helio X20 from MediaTek. The different chipset variants will be aimed towards different markets of the world.

The Samsung Galaxy S7 is likely to arrive with a 5.2-inch display and 3 GB of RAM and the Galaxy S7 Edge may feature a dual edge curved display of 5.7-inch or 5.8-inch along with 4 GB of RAM. Both the handsets are expected to come with common features like magnesium build, pressure-sensitive touchscreens, USB Type-C connectors and 20-megapixel cameras.

According to G for Games, the South Korean tech giant is also speculated to be working on a purported flagship called Samsung Galaxy S7 Premium Edition. It is said to feature another edition of the Exynos 8890 chipset that will be loaded with 14-core Mali T880 graphics.