Logging In to Apple ID Two-Factor Authentication on Old iPhone & iOS Versions

As many users know, using Two-Factor authentication for an Apple ID provides an additional layer of security for your Apple and iCloud login by requiring a pin code to be entered from an approved device before the Apple ID can be accessed. But the two factor auth feature is really built for modern iOS versions, and older iPhone and iPad models can have some difficulty with the feature, since there is no code prompt that appears on those older versions of iOS. So what do you do? How do you log in with two-factor authentication on an older iOS version where there is no code prompt?













