Samsung’s Galaxy Tab 10.1 Honeycomb tablet went on sale today in the U.S., and based on an FCC filing from Samsung today it looks like a 3G version of the Galaxy Tab 10.1 will soon follow.  The filing shows the Galaxy Tab 10.1, aka the GT-P7500 with a 3G logo, and test reports show that the device will support GSM 850 and 1900 bands, as well as WCDMA (UMTS) bands II and V.  Those bands are used by AT&T in the United States, and are a good sign that the 3G version of the Galaxy Tab 10.1 will be offered by AT&T in the near future.

Over the past several months we’ve seen several Android tablets with support for AT&T pass through the FCC.  Sony’s S1 and S2 tablets recently appeared on the FCC, and Acer’s Iconia Tab A501 appeared last week with AT&T 3G bands.  It looks like AT&T will soon have a solid lineup of Android 3.0 tablets.

AT&T has not yet made any official mention of a release date or pricing for the Galaxy Tab 10.1.