IPhone push/imessage not working?

Been having problems with my iPhone for about an hour, all of a sudden iMessage's have stopped sending and I'm unable to get any push notifications (twitter, facebook, etc) are coming through. I've reset the phone numerous times to no avail. Any ideas what else I can do?

Added (1). I've checked notifications in settings and their all on. It's happened before but it hasn't stopped my iMessage working too.

Go into notifications in the settings and make sure they are turned on

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