I ordered a white iPhone 4 conversion kit from www.iphone4parts.com because it's on sale for $109.00. Before ordering, I emailed them and asked about the quality of their parts. Here is their response: "All our parts are made from the highest quality materials to OEM specs." I made the switch last night, and now I have two problems. First, the home button does not sit flush with the rest of the glass. It's raised up just a bit. Actually, the white plastic that surrounds the outside of the front glass is raised up a bit too, making me thing the glass is actually too thin. Second, the proximity sensor plain doesn't work anymore. The screen will not turn off during a call no matter how much I cover the sensor. So, my question is, did I do something wrong during installation, or do I just have defective parts?