Question about going back to S-on

[Sere81]

Is there a way to just "flip a switch" to go back to S-on like it was to go S-off?

Seems like everything I'm reading makes it seem like it will reload the very first stock radio and rom and my phone will be like it was when I first got it?

 

[Sere81]

never mind, found what i was looking for.