Hello, All. Just wanted to throw this out there in case someone else was experiencing the same thing. My white iPhone 4 proximity sensor does not work w/ the Zagg shield on the front, but does when the shield is pulled down. Best Buy will not refund because they already installed the shield, which seems absolutely retarded to me since it's causing a problem and Zagg swears there is not an issue and just keeps offering to send a replacement. All they kept saying was that the sensor was in the same place so it shouldn't cause any problems. Ugh!