Hey gary. Contact your service provider to report your problem. This could be an issue on their end. Also consider checking your phone signal. Make sure you have signal or call and text messages won't come in.
My phone is doing the exact same thing.. If you get this figured out please E-Mail me.
I found out that it is only when someone with an I phone sends a text. They will need to go into their settings and turn off "I message" then after they send you a text they can turn it back on. They should do it... I have no problems now...
Hope this helps..