The SmartCheck device needs to align with your phone’s main camera. Do not place the SmartCheck device over any wide angle or telephoto lenses. Follow the steps below to help ensure your SmartCheck device is in the right position: Locate the main camera of your smartphone. There are 2 ways to do this: Visit your phone manufacturer’s website. Open your phone’s camera app. The default camera is your main camera. You can assess which one is being used by placing an object (like your finger) in front of each lens. Slide the SmartCheck device on to your phone. Slide the SmartCheck device over your phone (without a case) with the attachment knob on the same side of the phone as your screen. Turn your phone around so you can see your camera lenses and the SmartCheck lens. Align SmartCheck with your camera. The SmartCheck lens must be level with, or slightly below your main camera. If the SmartCheck lens is above the main camera, you need to move the SmartCheck device to the “down” position. The default SmartCheck position is “up”. Slide the device into the “down” position by firmly pressing down on the top of the device body, while supporting the bottom of it. You should hear it click into place.