I noticed yesterday that I was able to be on the internet AND on the phone at the same time and NO, my WiFi isn't on! I'm on 3G (4G isn't in our area right now, but it IS being installed currently but I haven't seen 4G on my phone yet.) I am rooted and started the Android Tether app on the phone and was connected with my laptop when I got a phonecall but my laptop was STILL browsing the internet and I was NOT in an office or anything. I disconnected the laptop and stopped the tethering app and restarted the app and reconnected the laptop and was browsing and talking at the same time again! Didn't see anyone post this yet so I thought I would! It works! Right now, I'm on the phone with a friend and browsing on my phone at the same time without WiFi on!