Using this product is super easy. First, take out the two screws next to the dock connector of your AT&T iPhone 4S. You can use either the pentalobe or Phillips screwdriver that comes with the kit, depending on what your phone needs. Once the screws are out, gently slide the old back cover off. Then, slide the new reflective back cover on in its place. Finally, put the two screws back in and you're all set. Remember, this product is only for AT&T iPhone 4S models. To keep it in good condition, avoid scratching the reflective surface. If it gets dirty, you can use a soft, dry cloth to gently wipe it clean.