IPhone 4s problems. What can I do?

Ok I've had this itPhone 4s for a year on a 2 year contract with AT&T and I'm just now having problems with it. About a week ago, it was having issues with the volume bar disappearing and not playing sounds and music. I looked it up and fixed it by cleaning the charging port, bottom speakers, etc. With a piece of paper and dry tooth brush. It started working for a day but now it goes in and out occasionally. Now after completely charging my phone and not using for several hours - the battery dropped to 50% which is very unusual. After a few more hours of no use, it goes down to 30%. I then turned off the cell data to make sure that wasn't it. It eventually got down to 5% battery left so I turned it off completely, and then the battery just stayed dead. What can I do to fix this? I don't want to go to AT&T unless I have to (if there's even anything they can do), but I'm not seeing anything I can do for battery problems.

If you have insurance just go to the apple store and show them the problem with your iPhone, and if the phone is not cracked or anything they'll just hand you a new iPhone.

Probably the battery is gone.
Go to AT&T store or Apple store and get your phone repaired

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