Reset password on device
Locked device and need to reset password
iPhone 6s, iOS 13
Question marked as
If you mean your phone displays Disabled see this Apple support link→If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support
Or watch this companion video ⬇️
If problem is Activation Lock you will need the Apple ID and password used to enable Find My on the phone.
If you just forgot your Apple ID password see→If you have forgotten your Apple ID password – Apple Support