Ok, pre-ordered white 16gb ATT from apple for launch day. Out of the box I had a defective mute switch. Would not lock into place and over the past 7-days, developed even more wiggle. Made a genius appt. for 1 pm today. That place was packed! They took the phone back and the genius came back out and said he cleaned it out and tried to convince me to keep it. I again explained that is not working correctly, please swap it out. They obviously are trying to avoid this at all costs. Well, he did the swap and I am so glad that I did. Immediately I noticed this phone is better in many ways. First, the color is more white than my yellow tinted phone. The mute switch works properly as well. Two other issues that I just thought were norm are very noticeably better with my replacement. The sensor with Siri works every time I put it up to my face. My original phone only worked 2/3 of the time. Lastly, there was a huge hiss/buzz during calls which is not present on this phone. I guess the original phone really was a lemon. I am shocked it made it through a QC process! To note, I watched the genius turn down 4 other people who were waiting to replace phones. One was a screen issue, 3 others mute switch issues.