IPhone 4S won't charge? URGENT?

My iPhone 4S is about eight months old (I think I got in November) and for the past week or so it won't charge unless I lay it on the floor with the cable sort of folded underneath it in a very specific position. I only have the one cable but I have changed the wall adapter to no avail. I'm wondering if this sounds like a software problem, a hardware problem or a problem with the cable.

1) is my phone still under warranty?

2) does it sound like I need to replace the cable? I don't want to have to pay for it only to see that the problem is in fact with the phone itself

3) should I take my phone to the apple store to see if they can fix it? I don't want to do that if it's clearly a cake problem

4) what could have caused this problem? When I take my phone in or get a new charger I want to know how to avoid this mistake.

P.S there's no crack in the cable and I've never let my phone get wet

The usb charge cable.

It sounds more likely the cable has a faulty pin connector or sleeve, or your iPhone's charge/data port is loose from its motherboard. If it's loose from the motherboard, a simple soldering should restore full contact with the motherboard free of charge (if under warranty.)

  • My iPhone won't connect to the App store + iTunes? (urgent)? I have to download the app for school on my iPhone 5c, but its not connecting to the app store? I changed the time to automatic, and I did everything but my iPhone is not working. Also, my time displayed on my phone is always messed up, and my Wi-Fi cuts out almost ever minute. I logged out of my apple ID, and tried logging in again but it won't let me log in again, and it says "Can't connect to iTunes" please help?
  • IPhone push notifcations not working! URGENT? I have an iPhone 3GS iOS 5.1.1, not connected, jailbroken, and push notifications DON'T work. It doesn't work on text plus, Facebook, or twitter! It's extremely frustrating. I restored my iPhone thinking it would make it work but it still doesn't work. It works on my sister iPod which is also jailbroken. I updated my iPhone just yesterday.
  • IPhone push notifcations not working! URGENT? - 1 I have an iPhone 3GS iOS 5.1.1, not connected, jailbroken, and push notifications DON'T work. It doesn't work on text plus, Facebook, or twitter! It's extremely frustrating. I restored my iPhone thinking it would make it work but it still doesn't work. It works on my sister iPod which is also jailbroken.
  • How can I charge I charge my iPhone without an iPhone charger when it is low and needs to be charged and I can't charge it? Reason I may not be able to charge my iPhone. Forgot or don't have any charger at all my, and no where to buy one or I don't have money to buy one. No where to plug in my charger or some other reason I can't charge my iPhone at all.