How to reset the phone to factory settings?

Okay, after you put the code, you will find two options. One of these options will be QA and then QC, okay? You have to press where it says QC. Once you press QC, you have to scroll down all the way to the end and press where it says Factory Data Reset, okay? Once you get that done, all the phone will be reset. If you don't find this option, you have to call the person that sold you the phone and you have to tell him to unlock the phone security. And that's it, okay?