Not every protective case has an integrated card holder or you prefer your smartphone without a case, anyway, if you still want a slot for your credit card, the BackPocket smart phone wallet may be a nice solution.
This is a simple and practical removable phone wallet. As shown in the image, the phone wallet sports a sleek design along with multiple optional colors. Using integrated adhesive backing strip, you can easily apply the ultra-thin phone wallet on the smooth back of your smartphone or protective case in order to provide a stylish pocket to take your credit card, ID and some cash with your smartphone.
Each set of two phone wallets is priced at $4.99 USD. If you like the design, jump to Perpetual Kid online store for more details.