So I took my 16gb 3G into the apple store because there was dust under the screen. I had just bought it a couple weeks ago off craigslist. Anyways the guy that sold it to me had a warranty for a few more months from AppleCare so I said that I was him and had a warranty lol. So they replaced it for a "new" refurbished one, and when I got home I noticed that it has a compass and records video! Also I looked up the number in the settings and it's a 3GS! I just thought it was cool and had to tell someone. I don't know if the guy did it on purpose, or an accident. Either way, I'm happy!