Can my iPhone mess up my credit card?

I have a iPhone 5 (8 weeks old) I bought a case telling me it can hold 2 credit cards and a ID card I'm like okay but I heard iPhones have magnetic fields and I learned from personal experience 2 interfering with eachother doesent look good:3 And I always have this case on it and I always use my American Express card for when I don't have money will it be okay if I put it in the socket near my phone in the case or am I ganna end up wiping the strip and ordering a new card

It is possible

  • Whee can i watch movies online without a credit card? Where can i watch free movies on my iPhone without registering or using a credit card? I would like to watch a couple of movies (the big wedding, little fockers) but am getting frustrated looking for websites that don't need a credit card.
  • ITunes Gift card instead of Credit Card? I found some things that i have been wanting on the iTunes store but i do not have a credit card registered with my account. If i were to buy an iTunes gift card, would that work in lieu of the credit card requirement? Also, the apps that i want to get are for the iPhone. Would buying an app with the gift card affect the plan with the phone in any way?
  • How to register an apple id for iphone without credit card and itunes gift card? Way back, there was no itunes gift card option and there was an option for "none" in payment method. But now, there are those and are required to be filled up. My sister can't register an apple id for her new iphone and its driving her crazy. Can anyone help?
  • Can't Create iTunes account without credit card? I've just gotten an iphone and whenever i try to download an app it says that it hasn't been reviewed by itunes when i try to sign up it doesn't have the option to not use credit card. I'm 13 btw so i can't just enter a credit card.