IPhone 4 headphone jack doesn't work

Whenever i plug in some headphones and play music/videos etc. The sound works but it comes out of the speaker instead of through the headphones. I'm upgraded to the latest iOS. Also not too long ago my power/sleep button up top got stuck pushed down and it won't come back up which still hasn't been fixed… Could that be related to the problem? (I'm using Assistive Touch instead of the power/sleep button ) From what i remember… I think the headphone problem came around the same time as when the power button got stuck… Is there anyway i could fix this or should i take it into a store?

HTC one, Galaxy S3/4, or iPhone5?

So I broke my iPhone today and I was wondering--what phone should I get next? I don't know when Galaxy S4 or HTC one is coming out, but I would wait till they come out.
I don't know which one is better either?

My iPhone won't connect to a Wi-Fi network?

I know that it isn't a problem with the router, because my laptop and both of my parents iphones are connected to our home network but my phone can't seem to find it. I have reset my network settings, updated everything, taken my phone on and off airplane mode and turned my Wi-Fi on and off multiple times as well as restarted it many times. What is wrong with it? Last night it found and connected to the network for about 10 minutes but after locking my phone and going back to it I found that it had disconnected again.

How to jailbreak iPhone 5 iOs 6.1.3?

I don't know much about jailbreaking. Can't find an easy download. Is there even a download for 6.1.3 yet? Is it worth the jailbreak anyways? Does it void by warranty with verizon?

If my iphone 4s is defective can I get an iPhone 5?

I've had this iPhone 4S since iOS 6.0.1 and it started off occasionally crashing randomly.
( just shutting off and back on ) and now I'm on iOS 6.1.3 and randomly on whatever app I'm on it will just exit out of the app and bring me back to the home screen. I want to know if I can get an iPhone 5. I'm not due for an upgrade until April 20th 2014 and I don't want to pay the $250 extra just to upgrade.

Why did my iphone 5 turn off and not turn on after a ios 6 update?

I have tried everything it won't show its charging i tried holding down the power and home button but that won't work, the screen is just black and won't do anything. I even tried plugging it into my laptop and that won't work either

Added (1). How do i put it in DFU? I hook it up to my comp and nothing happens at all. Nothing pops up on my comp and my phone won't turn on at all

Why can't I put mp4 in iTunes?

A couple of minutes ago I put an mp4 song on iTunes then transferred it onto my iPhone 4s. But now, when I try to it doesn't show up in iTunes. I tried to "add file to library" but that didn't work.Am I doing something wrong?

My iphone needs to restore and I don't want all my music and apps deleted?

Okay so I was doing the software update for my iPhone and after about an hour it said the update had failed due to an unknown error. Next thing I know a window comes up on my itunes that says, "iTunes has detected an iPhone in recovery mode. You must restore this iPhone before it can be used with iTunes." and that's my only option. If I restore it, I fear losing all of my apps and music that I paid for. Is there any way I can restore it without deleting all of my music and apps?

HOW TO UNLOCK IPHONE 4 FREE?

I bought my iphone 4 secondhand offline but it is locked to optus, and i can't contact the guy who sold it to me, but optus said they require a phone number; how do i unlock it FREE