U.K. iPhone carrier O2 has said that it will disconnect any customers found to be using the tethering feature of iPhone OS 3.0 that aren’t signed up for one of the company’s tethering Bolt-On plans. A number of iPhone users who have installed the 3.0 update have reported that it is possible to use the new tethering solution without singing up for the plan. O2 is planning to roll out its tethering Bolt-On plans for the iPhone 3G and iPhone…
