Looks like Sammy's prepping to bring one of its big Galaxy guns to AT&T's 4G race. The handset, bearing the same SGH-i727 model number as Rogers' Galaxy S II LTE and the FCC ID A3LSGHi727, just popped up on the Commission's databases giving us a glimpse into its guts and bolts. While there's no clear indication of the phone's screen size, it's likely to follow suit with a 4.5-inch Super AMOLED Plus display, adding to its beastly arsenal the orange-colored carrier's 850 / 1900 WCDMA and HSPA bands, 700MHz LTE and (surprise) LTE AWS -- helpful if that T-Mobile acquisition gets pushed through. Of course, there's the usual WiFi and Bluetooth mention in the docs, with the device powered by a 1500mAh battery. Could this be one of the OEM's recently announced wunderkind Galaxy R devices, or just a 4G update to its premiere S series? We'll keep an eagle eye out for this one's inevitable in-the-wild debut.