how to remove credit card information from 5S

The following link should tell you all of the information needed to remove credit card info from your iPhone 5s, however sometimes (this happened to me in the US store) it will force you to use another payment method, and if you don't want to use/don't have another credit card, just pick up a prepaid card such as a Visa or MasterCard for $25 if you have a local store that sells them. Anyways here is the solution -> Change or remove your Apple ID payment information - Apple Support