Today i can't open messages, can't connect to Wifi

Hi
its my Iphone5 ios 6.0.1, yesterday everything was working just fine, i wake up this morning, to find my iphone doing something strange, "it was connected to the charger" it restarted and the camera light was on, after that i was not able to open my messages at all, it just crashes when i click on it and goes back to the home screan, and i was not able to connect to my home wifi, keeps giving a message saying that password is incorrect, internet is working fine, wifi as well, its working perfectly on my wifes iphone 4 ios 6.0.1, i even deleted my network from my wifes phone and reconnected again to make sure that the password is working, i tried anything, shutting down, restarting, setting reset, clearing safari cookies, when i receive a msg on my phone i recieve it and can open it, but when i try to go back to the messages folders again it crashes and i'm back to the home screan, PLEASE HELP

i found out that when i turn Wifi Security off the iphone connects to it, very slow but works, but its not a solution, i cannot keep my wifi open to air

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