Why is it so hard for you people to admit that the iPhone 4 sucks as a phone. I am as big of an apple fan as they come and waited all year to get my iPhone 4 on launch. Then I got it and I am told I can't hold my phone the way i normally do, and the even more annoying problem is the proximity sensor. Don't tell me it's just a bad phone because I went through 3 of them and finally returned it for a 3GS which is still a lot faster than my old 3G. Apple screwed up admit it
Like the others above me said... there's nothing to admit! The iPhone 4 rules, and it rules as a phone as well. I've been having a blast using mine. I've been using it all morning at work inside a control booth (with tons of electronic equipment) that's notorious for having almost no cell service, and it's been working flawlessly.
If you have a problem, either your carrier is weak in your area, or something is wrong with your phone. It's one of the two (or possibly both, but unlikely).
I know trying to convince yourself the iPhone 4 is just a big trainwreck makes you feel better about your own purchase, but it's simple not anything of the kind. They are flying off the shelves for good reason. It's an awesome device, and an awesome phone.