Hey guys! Just got my iPad yesterday, and I have a quick question: I've signed up for my 2GB a month, and now I'm at work where there is no Wi-Fi, and I'm a bit worried: do I need to go into settings and disable 3G, so that it does not randomly connect when I'm in a different app, say...taking notes or something? Or does it prompt me before connecting? I'm just worried because I don't want to be doing something, and not know that it's using up my precious 2 GB a month without me knowing. Any tips?