We have introduced some practical iPhone wallets. But if you want to more conveniently use your smart card, maybe the following Tangram Smartcan meet your requirements.
The Smart Case is a versatile, form-fittingthat measures 118 x 61 x 12mm, weights 9g, and designed for both and 4S. As we can see from the images, the features gorgeous, sleek design, and is made with polycarbonate in order to protect the iPhone 4 or 4S from bumps and scratches. Most importantly, the iPhone 4 case also features a slim card holder on the back, which helps you to hold your smart card for easy access, moreover, an optional money clip allows the protective case to keep your money in place. Apart from that, all buttons and functions of your iPhone are accessible via custom cutouts.
The Smart iPhone 4 case is available in six colors, each one is priced at $34.9 USD. If you’re interested, jump to Tangram official site for more details or check out the following demo video first.