IPhone 4s volume down button won't push in at all?

The volume down button is fine but when I try to push the volume up on the side it won't even push in. I've had this phone for two months and it literally just stopped working like five minutes ago. All other buttons work fine. Like I said it won't even push in, but it looks fine. Any tips or help? Or should I just take it to the apple store?

Why won't my iphone record in HD?

I didn't change the settings or any thing but my iphone won't record in HD no matter what. Does anyone know what I can do to get it to work so I don't have to render my my videos all the time

Why is my iPhone screen messed up

Whenever I touch my iPhone screen it goes like haywire and does random crap it almost bought me a computer I don't need please help!

IPhone Problem while wanting to take picture camera is black screen?

I have not the newest iPhone but the one before that I think 3G, and I know that before when my phone had zero space available when I went to use my camera after I went to the camera the screen where you see what picture your taking is all black. But I updated and cleaned out my phone and I'm still having that problem. Please Help! I'm missing so many photo taking oppurtinities.
When the screen is black and sometimes even the shutter won't open. All the buttons are there so it's not totally black but when the shutter does open it is black. Not able to take pictures.
I have tried to reset it by pushing the tip button and the round one but still noting. I have tried turning it off for an hour but still nothing.
I'm super lost and have no idea what to do. Any help would be greatly appericated.

It the virgin mobile non-contact iphone 4 worth buying?

So I want to get the iphone 4 from target, but I'm not very happy about the price tag ($549.99 + $35 a month with 300 min. With Unlimited messaging and data) That's a *** load of money for one phone, but I like the plan though. Should I get the iphone or get some other non-contract phone from the target store?