Been using an app like MyWi to enable tethering on your jailbroken iPhone? Then there's a good chance you've already received a message like the one above from AT&T, or perhaps an email like the one after the break. By all accounts, the carrier is now cracking down on all unauthorized tethering, and it's asking folks engaged in such behavior to either pay up for a proper tethering plan or simply stop tethering altogether -- if it doesn't hear anything back for you after sending the message, AT&T says it will automatically enroll you in a DataPro 4GB tethering plan (at a rate of $45 a month). We should note that all the reports we've seen so far are from iPhone users, although that certainly doesn't mean Android users will simply be allowed to slip by unnoticed. Exactly how AT&T is identifying users isn't clear, however, and we could well just be seeing the beginning of a cat and mouse game as folks try to discover workarounds to go undetected. More on this one as we get it.
Update: AT&T reached out to us and, yes, this is pretty much all there is to the tale: the "small number of smartphone customers who use their devices for tethering but aren't on our required tethering plan," are being contacted to either cease and desist or prepare to start paying for the service. No word yet on how many customers have been contacted, but it does seem that they're all using iPhones.
