BGR has obtained exclusive images of AT&T’s upcoming Samsung Galaxy S II smartphone. Following our report on Monday showing an unnamed Samsung slider headed to AT&T, we have confirmed that the device pictured is indeed a variant of Samsung’s blockbuster Galaxy S II headed to AT&T. Live images of the device reveal the Galaxy S II model number, SGH-I927, along with additional details surrounding the sleek Gingerbread phone. While it appears as though Samsung managed to keep AT&T’s Galaxy S II relatively slender in spite of adding on a full sliding QWERTY keyboard, the textured back cover on the phone looks like a bit of an eyesore. The Galaxy S II is already the fastest-selling Samsung smartphone of all time, and it has yet to launch on a single carrier in the U.S. market. While U.S. carrier versions of the smartphone are expected to arrive in August, release timing and pricing for the AT&T version pictured here are not yet available. It is also unclear whether the device will launch with the Galaxy S II moniker or with AT&T’s own branding as the original Galaxy S did. Several additional images, including a pair that shows off some very impressive benchmark test results, follow below.