Iphone price if contract not over yet?

I have a question. If you already have a contract, how much would it be to like upgrade phones? Anyway like an EXAMPLE you got an iphone 4 with a two year contract and youve only had the phone two months what would you do if you wanted to get a 5? Would you have to wait or if not would you have to pay 600$ not the 99$ 2year contract price.

Twitter App Not Notifying Me?

I have the Twitter App for iPhone, when I first downloaded it (months ago) it would notify me. Now, it'll only notify me of retweets & mentions SOMETIMES. I have it set up to notify me of new followers, retweets & DM's but now it doesn't notify me of anything, I have to open the app to see everything. It's always running in the background. What's the issue?

How to get rid of black water spots beneath my iphone screen?

Last night i left my phone on the sink while i was having a shower and when i came out, like a drop or two of water was beneath my iphone 3gs. When i turned it on, grey splotches were appearing. I really need to get rid of them without getting a new screen because my mum will kill me!

IPhone 4s not syncing to new laptop?

Ok so I finally got up to put my iTunes onto my laptop from my desktop. I downloaded iTunes, put all my songs on, and now it's not syncing for some reason. I updated my iPhone, now I don't know what to do. There's all these things about "backing up your iPhone to your computer" and I clicked on that to download but nothing really happened.
I click sync and nothing happens. I googled it and some people said they had to assign their phone to the new computer or something.
I'm clueless. Someone help!

Added (1). I just downloaded the iTunes off the website, so how could it not be up to date?
http://www.apple.com/.../download/
Off that website^ so it has to be new

Sprint iphone 5 picture messages

I have the iPhone 5 for sprint and I'm havih trouble sending pictures mms/SMS to anyone I text. They keep failing and won't send. I send regular messages just fine but the pictures won't go through. Is there something wrong with iPhone 5? My friend has iPhone 4S with sprint and sends pictures without a problem. Don't want to hear how sprint sucks or stuff like that etc. Just want to know if anyone knows what I can do to fix sending pictures and I do have my mms messaging on and group messaging on.

What is applecare for iphone 4s good for

I bought my phone 3 months ago, and i bought the applecare with it. I've damaged my speakers (on the bottom) with water, they still work, but they suck.could i get a new phone from using my applecare?

Added (1). I have AT&T if that matters.

Will my sim card work in iphone4?

I currently have a blackberry on virgin, looking to buy an iphone, i don't want to change contracts, just want to know if i buy an iphone locked to certain networks will virgin simcard work, for example EE or tmobile? Without having to unlock the phone.

How to unsync my iPhone with my iTunes?

My phone is hooked up with my iTunes library on the computer. Because of this, I can't put songs on my phone without having them in the iTunes library and I can't remove them off my phone either. Is there a way to unsync it from the library so that I can manage my music specifically for my phone?