f4780y said:I tend to agree that AT&T are likely just analysing traffic volume and patterns on your device and nothing more. I doubt they are going to a level of identifying a browser client on HTTP traffic, but they are analysing none the less.
I don't see any evidence that mac address or IMEI play any part in it. Ive seen places require you to register a device mac address for network access and tethering works fine if you register the phone and then connect multiple devices through it. My speculation is it's just your luck whether your usage patterns make you get flagged or not...
Yeah, believe me - if they REALLY knew for sure if you were tethering or not, they wouldn't give you a chance to "opt-out"!! As of now, they are not going to that level as I've heard of people who really do tether get away with it, just by telling AT&T that they use Pandora a lot - and AT&T says "Ok, no problem- then we won't charge you"!