Just got my Captivate today, and it's great. I've been using the WiFi in my house, except for a very brief spell on 3G. 3G watchdog said that I had used 512.1 KB while on 3G. I then went back on WiFi to continue downloading apps and whatnot. I checked again and it is now up to 512.9 KB, and it hasn't been on 3G at all. My sister also got a Captivate, and I noticed that while hers is on WiFi it has the "WiFi" symbol, and the "3G" symbol is gone, but not on mine. I still have the 3G up when using WiFi, so I think this may be the problem. Any idea how to fix this?