Hello, Welcome to Apple Discussions.
If you go to Settings - General - Network - and turn 3G off, when you get the E for EDGE are you able to then send and receive?
If you are go back to Settings - General - Network - turn 3G on, are you then able to send and receive?
If you find this is not working especially after the restore. You may wish to contact your cellular provider for further assistance with SMS. They can check and ensure you have the proper data package and it is setup properly and offer further network troubleshooting.
http://www.apple.com/support/iphone/troubleshooting/
http://www.apple.com/iphone/tips/