Can I get my iPhone 4S replaced?

I have an iPhone 4S. I'm not due for an upgrade until January 2014. However, my phone barely works. Not only is the entire front screen and back shattered, my home button does not work and now the lock button doesn't either. It is very frustrating. Also, it takes forever to send a message and Internet is very slow. I know this has nothing to do with my carrier because my sister has an iPhone and her Internet and messages work perfectly fine ad we're on the same exact plan.
I have gone into apple before and they said they can replace the phone for the contract price which used to be $200 for the iPhone 4S. However, now that the iPhone 5s and the iPhone 5c are now available for the contact price of $200 and the iPhone 4S has a new contract price of $0. Would they be able to replace my phone for free?

Instagram videos not playing?

I have an iPhone 3GS and my network is giffgaff and when I go to play an instagram video a refresh logo appears on the picture and when I tap it nothing happens and the video won't play

My iPhone got wet, how do I fix it?

I plugged my phone in last night and put on my night stand and when I got up this morning it got wet. I had a glass of ice water on the night stand too which may be the case, but it has also been flooding near me from all the rain so I'm not sure. I lightly shook it out and wiped off the water and then put it in a bag of rice for a few hours. When I tried my audio is doesn't work anymore. I just put it bake in the rice. Any other ideas because I really need my phone

Added (1). The audio now works, but it barely charges. It would say it's at 26% then go down every few minutes or when I use it. But it would have the charged symbol next to it.

Added (2). It now will not turn on

IPhone Without Connecting To A Service Provider?

If I buy an iPhone off criagslist, can I still use it if I don't pay the bills
Like don't hook it up to network like verison.
I thinking of getting an iPhone 4 off Craigslist and just downloading a texting app
Would this work?

How To Unjailbreak iPhone 5/iPod 5?

I want to unjailbreak as iOS 7 is coming out. I've seen many ways of how its done but each ways seems to be different. Some videos say to just make a backup and restore. And some say back up, put it in to DFU mode while plugged in, then restore. How do I do it without harming my iPod 5?