I saw this article http://radipad.com/content/135-real-reason-ipad-has-micro-sim-card.html that says that by switching your SIM card from your iPhone to your iPad you can use the 3G plan you are already paying for on both devices. It just needs to be cut to size, and an adapter used to make it fit back in the iphone. Is this really true?? If so that would be amazing and save me some money 