IPhone 4s won't record sound with video?

My iPhone 4s suddenly won't record sound when I record a video. It is usually a static sound or sometimes it is the sound, but extremely quiet. Also, when I try to FaceTime, I can hear the other person but they can't hear me. Any ideas on what I can do to fix this?

IPhone 4S sleep button doesn't work?

Today I helped my sister move and I left my iPhone 4S in the console of the car so it wouldn't get too hot or anything. After about 2 hours of moving I went to check my phone and the sleep button won't work anymore. I have never dropped the phone or gotten water damage, it's in perfect condition. What do I do? I'm afraid apple won't replace my phone!

Added (1). To clarify: The button is not stuck. It still has its "click."

Can colleges track me on Wi-Fi?

So I've arrived in dorm a few days ago with my iPhone 4 and Lenovo ThinkPad T-420 (two Wi-Fi enabled devices) and am wondering if the college can track me on their network. I'm a type of guy that visits a "a variety of websites" and doesn't want to be tracked. (Yes I admit to going on adult websites.) Would I get in trouble for that. Today a chick in charge of the female part of my dorm and a dude in charge of the male part came up and ask am I going to an event. After I said yes the female asked to see my phone. I'm like WTF!

When should I charge my iPhone 4S?

I got an iPhone 4S today and my friend said don't charge it until it's at like, 5% and don't take it off the charger until its full because it messes up the battery. Is that true?

How to add SOME music from itunes to iphone?

I just recently purchased an iphone and I would like to put music on it. I have over 1000 songs on my itunes and I don't want to put all of them on to the phone. Is there any way that I can add selected songs to the phone?

How to correctly sync your iPod or iPhone into a Ford Escape 2009 to play music?

I try plugging it in with a USB cable and I push in AUX and it syncs but when I go to my music app, all it says is "Device is connected" and won't allow me to access my music. I have a black chord that I plug into another input that works with AUX that's allows my iPod to play music and gives me access to my music app. Why will only the one chord work and not my USB chord? The black chord doesn't require a sync though.