One of the big advantages to jailbreaking has been the ability to enable tethering without carrier support. That doesn’t mean the carrier is unaware of the way the phone is being used. In fact, AT&T has started sending text messages to customers who are tethering without the company’s tethering plan.

The message reads as follows:

“Did you know tethering your Smartphone to a computer requires a tethering plan? Pls call 888-860-6789 for details or visit att.com/dataplans.”

Some customers are also receiving emails about the usage, alerting customers that they will be automatically enrolled in the DataPro 4GB plan if they don’t get in touch with AT&T. From the email:

“If we don’t hear from you, we’ll plan to automatically enroll you into DataPro 4GB after March 27, 2011. The new plan – whether you sign up on your own or we automatically enroll you – will replace your current smartphone data plan, including if you are on an unlimited data plan. If you discontinue tethering, no changes to your current plan will be required.”

AT&T says the goal is fairness to customers. Yes, they would like to screw all of us equally.

It may surprise you to learn that unlocking and jailbreaking your cell phone has to this point been against the law. It’s especially surprising considering some of the first news when a new iOS build is released is who can jailbreak it the fastest.

The legality, at least, will no longer be in question. Feds ruled to make it a legal practice to remove the barriers between you and the awesome powers of your phone. In reality, this doesn’t do much. It’s not like jailbreaking was being enforced in any serious way in the past. This also won’t change things for the current jailbreakers. They’ll keep going, hacking as they have in the past, and the people using alternative app stores will likely continue to do the same. The only people this really affects are the few entrepreneurs out there who will try to make a legitimate buck by opening yet another app store for interested parties.

If you are such a party, start looking for your new apps soon. Otherwise, as you were, folks. Nothing to see here.