I have a Galaxy Note 2 and it just recently started sending text message notifications over and over until I check the message. It literally will keep repeating until I look at it. AND my camera flash will come blink for no reason and then sometimes just stay on steadily until I restart my phone. AT&T told me it was my SD card causing the problem? So I bought a new one and it's still doing the same thing. Can anyone pleeeeease tell me how to fix this?