Using this iPhone 4 back mirror kit is a breeze. First, gather your tools: the reflective plastic back and the right screwdriver from the two provided (either the pentalobe or the Phillips, depending on your phone). Locate the two screws next to the dock connector and carefully remove them. Then, gently slide the old back off your iPhone. Now, take the new reflective back and slide it on. Put the two screws back in place to secure the new back. It should only take about 5 minutes. Remember, this product is only for AT&T iPhone 4s. Don't try to use it on other models. To maintain your new back, keep it clean with a soft, dry cloth. Avoid using harsh chemicals as they could damage the reflective surface. That's all there is to it, and you'll have a useful mirror on your iPhone in no time!