My iphone 4 won't send or receive any type of message?

My iphone randomly stopped being able to send texts or imessages entirely. It can't receive them either. The message app is crashing alot. I've tried to delete all my messages to see if that would help and they all just reappeared. I've reset all settings. I've reset network settings. I've done a hard reset. I've done everything imaginable. For a little while yesterday it was working again. But it won't work anymore

Try turning it off and on. Believe it or not, it may help.

I think it's time to call the apple store.

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