MICHAEL Michael Kors Essential Zip Wallet for iPhone 4S

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  • Best Answer:

    I have never had my phone being next to a credit card give me a problem, however, if you are at a hotel it will demagnetize the credit card type room keys! I have had it happen on several occasions

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  • No. Your iPhone will not de-magnetize your credit cards.

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  • I have had 4 credit cards in my wallet iPhone case and I thought I was going crazy when all my cards kept saying card read error. So yes the phone and the wallet case if there is a magnet on the case it will eventually demagnetize your card.

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