The company I worked for just signed on with the Good for Enterprise app so that we can get our company email/calendar on our iPhones and other smartphones. In the user guide, it specifically states that AT&T customers will be asked to switch to a limited data plan as a result of using this app. "If you currently have an unlimited data plan, please know that with this change, AT&T will move you from the unlimited plan and to a limited data plan. You have 2GB or 4GB cap options, as described in the plan names above." I never knew there was an app that could cause you to lose your unlimited data plan. Has anyone else had any experience with this app or other apps that could cause you to lose your unlimited data plan?