I have the same model as you, only it is Verizon branded. It's a wifi-only because I can't activate it on the network. It is currently running 2.3.5. You should have gotten an update to Gingerbread from Samsung. However, it's a lot more difficult to root the tab once you take the update. Regardless, there's plenty of roms out that will give you the same, or better, experience.