AT&T Going After Unauthorized Tetherers

There is a little app called MyWi which gives iPhone users the ability to tether their phones without AT&T’s permission. Apparently AT&T is taking steps to stop such unauthorized tethering by some of its users.

AT&T sent a letter to tetherers requiring them to stop or be automatically charged a $20/ month DataPro plan on their bill.

Until now, people have assumed that AT&T either doesn’t care or cannot determine that the traffic comes from a connected device rather than the iPhone itself. Clearly, those assumptions are incorrect.

For more on this, check out MobileCrunch, osXDaily and TUAW.