Front camera not working on my Iphone 4?

On Tuesday, I accidently dropped my phone. I didn't think anything happened to it so I put it back into my pockets.

Later on that day I wanted to take a selfie with my friends and when I tried turning my camera around it just froze and wouldn't work?

Has anyone else had this problem? Can I some how fix it myself or do I have to take to a fixing shop for them to fix it?

Will the iPhone 5s price drop?

So I'm planning to get an iPhone for my birthday (which in in April 2015) and I wanted to know if or when the price of the iPhone 5s would go down, if it doesn't I can always get the 5c but if would love to get the 5s. The problem is that it is too expensive, for example I can currently get the iPhone 5c for £14 a month and pay £150 at the beginning but if i were to pay £17 per month for the 5s I would still have to pay at least £400 at the beginning.
So I'm hoping that the price of the 5s would drop to the price of the 5c now by April, do you think that this is possible with the release of the iPhone 6?

Smart field search for safari won't turn off?

Smart search in Safari of my iPhone will not turn off even though I have disabled it in settings
I have gone to settings > safari > smart search field, and turned off search engine suggestions and preload top hit.
I have cleared history and cleared cookies and data.
I have reset the iPhone by holding the sleep and home button down until the apple logo came on
I really want to turn off the smart search so that no suggested sites or top hits show up.

How much will iPhone 6 cost?

I need to know when the iPhone 5s drops I'm gonna need my phone by then & how much would it be NO CONTRACT? I will not spend more than $600 on a phone. How much would a non contract iPhone 5s drop?

How to know what specific times my iPhone was being used or if a specific app was being used?

While I was sleeping last night, I had my phone by the left side of my pillow. But when I woke up, my phone was on the other side of the pillow. I want to know if someone picked up my phone and used it and left it on the other side of the pillow. Because if they did, they could have accessed some very private data. I want to know if there's a way to find out if the phone was unlocked during the time I was asleep or if any apps were opened while I was asleep. Is there a way to find out?

btw, i'm still using the iPhone 4

Which is more screen protected lifeproof or otterbox?

I want to buy a case for my iPhone 5c. My first I phone 5c was dropped while playing basketball (it was a dumb idea). I want to know which case is more screen protected the lifeproof case or the otterbox defender. I currently have the otterbox defender but I want to see the comparison of both. I know there's a lot of different protection on the lifeproof case like the water proof, the snow proof etc. I mean I really don't care about that stuff but I want to know which one protects the screen from damage.

Is it possible for my iphone to be hacked from a different country?

I'm curious. Is it really possible? As in, can the person see the apps that I've been opening and the things I've been doing there? My iphone doesn't have a SIM card in it, but I still want to make sure. Maybe I'm just being paranoid, I don't know. And how would I know if I've been hacked (in my case)?