Nokia 6200

My 6200 is almost one year old. This past week I started receiving phone calls from people that never dialed my #. I have received incoming calls from "911" many times, from "411", my wife's phone and mine "called" each other and mine recorded hers on voicemail-dialing my phone-and we left our phones locked up while we were at neighbors. Then, my phone rang and the caller ID displayed-MY own cell #. It called itself!!! Tonight it started again, so I just turned it off. Then my wife's phone rang, And yu got got!! It was my cell, which is turned off! Ok, I don't believe in ghosts, so if anyone can explain this PLEASE HELP!!!!! Thank you
Kharma217@yahoo.com