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 connect the dots in this case and declare that a certain Samsung SGH-i337 that the FCC just waved through is likely that very model. Why? First off, it's carrying a certain LTE band 17 used exclusively by AT&T in the US. Secondly, the dimensions line up perfectly with what we recently got our hands on at Samsung's recent Galaxy S 4 phone-a-palooza. Finally, we