My iPhone 4 camera won't work?

My iPhone 4 camera won't open at all? I press the camera and it freezes on the grey spiral looking thing or sometimes it opens but the screen is all black. I know it's not my lense because it works once in a blue moon.
I tried turning the power off and back on but it won't work, I even deleted some photos but it still won't work. I don't want to restore my phone and delete everything. Any ideas?

What is the back of the iphone 5 made out of?

I'm deciding whether to get the iphone 5 in black or white and i can't find it anywhere but what are both of the iphone's backs made out of? I'm leaning towards white right now because it had the aluminium side like the 4s does but could anyone offer a insight to why apple decided to do this?

How much would an iphone 5 cost with upgrade?

Ok so i'm waiting for the iphone it comes out sept 21st and well for verizon its 199$ for the 16gb how much would it be in total +tax and activation so i can see how much it will be?

How early should I go to the apple store on the 21st to get an iPhone 5?

It says they open their doors at 8. How early should I go so i can get one. I don't want to wait in the line for a long time for no reason. Is 6 early enough? Anybody have any expcriances with waiting in line for the newest apple product?

Added (1). I know I'm going to be standing in a line, obviously there's going to be people camping outside the store for a couple of days before it comes out. I just want to know how early to go so I'm guaranteed an iPhone 5

Can I use my iPhone's AppleCare?

Ok so I bought an iPhone 4S on Craigslist around 2 months ago everything's great it's still under warranty it even has apple care but the guy who sold it to me never gave me the apple care booklet thing. Is their anyway I can go to the apple store without having the apple care booklet? Just incase my phone messes up.

Can't hear the person I'm talking with iphone 4?

I have my iphone like 6 months now and when someone calls me, they can clearly hear me but I can't hear what they say from my receiver. No sound at all. When I turn on the speaker, I can normally hear them. Earplugs work as well. But why can't I hear them from my receiver?

Itunes help! Songs dissappered?

My iphone 4 just lost songs off of it. For some odd reason i lost songs. They are songs sorta recently put on ( 4month span). They are songs i purchased on itunes and downloaded off a cds. I went on itunes and they were in my library but on on my phone. I tried synching it but it doesn't work

I need some help i have no idea what to do