I purchased one of the first Comms, and returned it last June for an upgrade. Dynon told me the ID tag should have a "Mod AB"on it (as of last June), so I think you are OK. I would check with Dynon Customer Support just to be sure there are no new mods. They told me the mods were due to transmission and noise issues (which I was having). Dynon covered the upgrade, but your (or whoever is reading this) situation may be different. Again, I would go ahead and contact Customer Support.