Hello Nickster1963,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
iOS: Troubleshooting Messages
http://support.apple.com/kb/ts2755
To resolve issues with sending and receiving SMS, follow these steps first
- Go to Settings and turn airplane mode off.
- Verify that you have a cellular network signal in the status bar at the top left of your iPhone. Learn more about troubleshooting no service if there's no signal.
- Restart your iPhone.
- Tap Settings > General > Reset > Reset Network Settings on your iPhone.
- Reseat your SIM card.
Best of luck,
Mario