A variant of Samsung's Galaxy Tab series appears to be making its way to AT&T, with LTE connectivity in tow. We've just seen FCC filings for the Samsung SGH-i957, a code number closely linked with the Galaxy Tab, and if you look closely at the image above you'll see the distinctive AT&T 4G LTE logo. While we don't know for sure if or when this device will actually launch at AT&T, a Galaxy Tab would give the carrier another LTE device in its portfolio as it finally begins to roll out a true 4G network.