http://forums.androidcentral.com – My wife is having an issue on her S3. She has had the sms app freeze every day or two. The stock sms app would flash to the "no messages" screen the way it would look if you had just opened it for the first time and she wouldn't be able to send or receive messages. Restarting the phone solves the issue temporarily until it happens again. Factory reset lasts a couple days. (HowTos)