Support Optimus S lighting up randomly

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http://androidforums.com – I JUST got this phone about... 3 weeks ago? The phone isnt rooted or anything but the screen lights up over and over again, I tryed killing tasks and I don't have a live wall paper or anything, it also reboots and freezes a lot! It reboots in the middle of phone calls and texts! It'll freeze up at random times. Most of the apps I have installed force close and won't let me use them, so there's no apps installed. I have factory reset it twice and still see the same problems, I called my phone company and they told me the warranty was only 14 days instead of 30!! Is there any way I can fix my p (General)