The new AT&T Mobile Share data plans are available for new and existing customers starting today. We took a look at the plans when they were first announced a few weeks back, so current AT&T customers should have had plenty of time to think things over. There really isn't a huge savings between Verizon or AT&T's on these plans, so neither should be enough to make you switch carriers. AT&T is offering plans in their Mobile Share packages starting at 1GB for $40 with $45 per device, all the way up to 20GB for $200. All packages include unlimited voice and messages.
If you're a current AT&T customer you can sign into your account to view your Mobile Share options and new customers can choose one when setting up a new account. Head over to AT&T for more.