I have a Samsung Galaxy S3 that I purchased in August of 2013 and use the AT&T carrier. I have had no problems with the phone until last night. Now I keep getting the same text messages over and over, and it keeps sending out my last Message to the person I texted over and over. I also am not getting my text until 1/2 or more after the person texted me. How do I get this to stop and the texting to work correctly again.