My iPhone 4s has been unable to receive calls and when I call someone with an iPhone 5 I get a message saying I have to put in a credit card. When she call me with her iphone, she gets another weird message. I can't get email or go on the web while out with my phone. What is going on? This has been going on all day and others I speak to with Apple AND Verizon say they are having trouble with their phones as well. What is going on??