Okay, so I've looked everywhere. I've even looked at videos that SHOW where the setting is supposed to be. When I look myself, it's not there. My provider is Sprint. What should I do?
I bought a used S4 and I got it unlocked to use with my provider, Rogers. I believe the phone was originally locked to Videotron (montreal company).
When I try to make a call I get a box saying "Not registered on network".