I just jailbroke and installed MyWi (haven't bought it yet, but I think I probably will since it works brilliantly), and I'm wondering if it's very risky to use my Iphone as a wifi hotspot? Does AT&T see this as just data usage, as if I was watching youtube videos or surfing safari, or can they tell that I'm tethering? Basically, I'm wondering whether tethering (no more than a GB per month or so) carries a real risk of incurring extra charges/having my service cancelled. Thoughts? EDIT:I guess I should clarify, I'm using an iPhone 3GS with AT&T that I bought right around when the 3GS was released.