My first iPhone came and all was good. Then I noticed there was a problem with the antenna and it was basically bad. AppleCare tried to solve it, couldn't. Then it started making a weird noise when connected to wifi and on a call. It was extremely high pitch and very distracting (others have reported this issue). The genius finds this issue a hardware issue, replaces the unit. New phone, no issues. I thought my eyes were going crazy, but the new unit had scan lines horizontally really really bad. It drove me nuts. I tried living with it, then made my drive back an hour to the Apple store. The first genius claimed nothing was wrong, so he went to someone higher up.. (senior advisor) and in front of me, the other tech said "You don't see that? It looks all pixelated, it needs to be replaced." Then offered me a free case because she said this is ridiculous they've all had issues. So today I'm extremely happy and the new one is PERFECT. At night I turn my phone on vibrate... I get a call. The vibrator is loose and shaking and making a clacking noise unlike the last two. If I hold the band tight it stops and makes the normal vibration. This last issue is livable, but this is getting on my nerves. My $700 device should be PERFECT. I'm tempted to buy the special screw driver on ebay to open it up and tighten the vibrator screw. I think that is the issue. I've replaced several iPhone 3G & 3GS cracked screens for friends so I know my way around a tiny bit. In any case, this is really ANNOYING!