Hello how may I help you? I want to upgrade my mobile plan. Sure, what is your account number? 20934984. I want to upgrade to a plan that offers free calling 24/7. We have two plans that offer free calling 24/7. What's the difference between them? Plan A is an extra $20 a month and it has free text and calling. And Plan B? Plan B is an extra $15 and it only has free calling. I'll take Plan A, please. Sure, I have upgraded the plan for you.