I went to settings general wifi Internet options. And it's not there
iPhone 4S, It's just not there
Posted on Sep 19, 2012 2:37 PM
Q: My new iPhone 4 s does not have tethering Option where it should be anyone know why
It's there, it's just moved:
Settings > General > Cellular > Set Up Personal Hotspot
Of course, if your carrier doesn't support tethering, or you don't have a tethering data plan, you'll have to sign up for that first.