I purchased a phone from apple and am preparing to send in my old phone as a trade in. When I attempt to erase all content and settings, it asks me for a 4 digit code. I don't know what it is and cant get this completed.
Since they are asking for a 4 digit code, I know it's not my apple id password or my old passcode to get into my phone (because it was 6 digits). How do I get past this step?
iPhone X