Lost iPhone administrative password

If you have forgotten the Passcode, check this link...

If you forgot your iPhone passcode - Apple Support

If it is your Apple Account Password, check this link...

If you forgot your Apple ID password - Apple Support

If niether of those, please explain...

All passwords have to do with administration. You are asking us to guess.

Maybe if you could tell us with some details what you are trying to do, we might be able to gather a clue as to which password you might be asking about.