If you cast your minds back a couple of months, you’ll remember how we told you that AT&T had begun clamping down on people using tethering on their iPhones without paying for the upgraded tethering plan. Emails and SMS messages were sent informing customers that if they continued to tether they would be charged for it. At the time we weren’t sure how AT&T knew which people were actually tethering, but now we do and more importantly, we know how to get around it.

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