How to turn off 3G on iPhone 4S?

I don't like to use my 3G constantly / whenever i leave the house which is daily because of how expensive it is and the only way I found to turn it off is airplane mode but in airplane mode you can't text or call which nearly ruins the purpose of my phone. Is there a way to turn 3G off instead of airplane mode?

Go to settings- general- cellular. Then turn it off

Yes there's.
you go to setting>general>cellular>and turn of the 3g slider, this with put your phone on edge, using much less battery, but also much slower data speeds, i have a 4s too, and i use edge because i don't have data, and edge dosnt effect normal call quality

Go into settings, scroll down to general, go to mobile data. You will see enable 3G. Click so it's off