AT&T is finally preparing to crack down on iPhone users who take advantage of jailbreak tethering solutions to avoid paying for the feature. 9 to 5 Mac reports that as of August 11, any iPhone user who uses such a solution to tether their phone and has previously received a notice from AT&T regarding their use will automatically be switched from their current plan—including grandfathered unlimited plans—and onto the 2GB/$25…
