We have to be skeptical when new devices arrive at the FCC without photos or a blinking sign that says "I Am AT&T's Samsung Galaxy S 4." But even doubters can likely tie that model to a certain Samsung SGH-I337 that the FCC just waved through. Why? First off, it's carrying a certain LTE band 17 used exclusively by AT&T in the US (in addition to bands 2, 4 and 5, also frequently featured by the carrier's LTE devices). Secondly, the dimensions line up perfectly with the device we recently got our hands on at Samsung's recent Galaxy S 4 phone-a-palooza. Finally, we already saw a device packing the same model number on UAProf, a normally reliable source that revealed a 1,920 x 1,080 screen and "ARM11" Exynos processor. Since it's unlikely the carrier has another unannounced 1080p model coming from Samsung, those coveting an AT&T GS 4 can probably start warming up their wallets.