IPhone 4 messages not working?

I was sending a really long text of smiley faces to annoy my sister and my messages ended up freezing. I did a hard reset and another reset in settings but its still not working. What should I do? When I go to messages it's blank.

1.Restart your device.
2.Update to the latest iOS Software.
3. If you are trying to send a message to multiple recipients and you type in each contact manually instead of using the contacts list, make sure you tap return instead of space to separate each one.

Note: Get some more information from the source URL if the above steps fails.

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