How can I set my Samsung A737 to auto delete text messages?

I have AT%26amp;T and on my old motorola fun I can have it automatically clear out old text messages. On my new samsung I keep filling up the text message space on my phone and having to manually go to the delete all option. Its very annoying because the phone will fill up and then you can't receive new texts until you clear out the old ones.|||Try going to your text message section. Look for settings. Then in there look for auto erase.