My iphone 4s will not connect to the internet except with wifi

Try turning Airplane Mode off and on, or powering your iPhone off and on and/or a reset which is similar to a computer restart.

If no change after that, try resetting network settings on your iPhone.

If no change after that, contact your carrier.

Hey Stephen, you can turn off Wi-Fi and turn it on back. If the problem further persists forget the network and then reenter the password and connect. You can read the full instructions here: http://www.technobezz.com/iphone-wont-connect-to-wi-fi/

I hope this helps.