I've got an iPhone 4 running iOS5, jailbroken, of course. I'm on AT&T with a grandfathered unlimited data plan. Yesterday, I got a notice from AT&T that I am now in their top 5% of data users and that my data rate might get throttled back in the future (right now, they just want to sell me a different data plan). Currently, my Cellular stats have me at 120MB sent / 3.3 GB received. Does that sound like I'm in the top 5%? Two days ago, I was at a hotel that wanted $15 for WiFi access, so I installed PDANet so I could tether my laptop. It worked, but was slower than crap, so I only used it for a minute and went back to my iPhone. Certainly didn't use much bandwidth while tethering. I'm wondering if AT&T detected I was tethering and instead of sending me the "we know you're tethering" threat, they sent me the more innocuous "top 5%" notice. On a related note: Does anyone know the approx. difference in data usage between Pandora's "Higher Quality" setting versus the default?