I have yet to try it, but has anyone configured multiple different iPhones with the same credit card? My 3 kids (teenagers) all have iPhone 6's and I wouldn't mind adding one of my credit cards to their phones, just in case they need it (granted, locations for use is another story, but nonetheless...). Do the card companies (or Apple themselves) limit the number of phones that can be attached to any one card? Or can I securely add the same card to multiple phones, presuming I go through the setup and verification process on each phone. I will be getting them credit cards in their own names eventually, but until then, I was wondering if this could be a stop-gap solution.