See how much longer prepay will last

Nowhere does it tell me when my plan started and when it ends. I guess I'm just supposed to trust you and sign up but I'm saving money. But what if I have 11 months left on my plan? I'd have to and hopefully be able to find that information which I doubt. Tell me when my plan ends and how much I spent this time. Next tell me when the new plan would start for the $292 and show me how I would save money