How to Reset your Apple Pin

What might “Apple PIN” mean exactly?

• Your iPhone’s passcode? Settings > TouchID & Passcode > Change Passcode
• Your Apple ID password? If you forgot your Apple ID password - Apple Support
• Something else?

I'm sorry, but what do you mean by Apple Pin. What are you trying to do and if you see something on the screen, what is it asking you?

You do not need a pin to update your iPhone. What exactly are you doing and where are you getting stopped? If you see an error on the screen, or the screen is asking you for something, please provide the exact text of what it is asking for.

That is your passcode, the one you use to open your iPhone.