Have Your Login Info Ready
Installing the iOS 15.7.3 update on your device might prompt you to input your Apple ID/iCloud account details and your passcode.
Most of you should know these by heart, but if has been awhile since you've had to login, or if you're installing iOS 15.7.3 for someone else, you'll want to make sure you have that information readily available when you start the installation.
There's also a chance you'll get logged out of some of your first and third-party apps and services after the installation completes so you'll want to have this login info handy as well.
If you want to complete the iOS 15.7.3 installation process in the shortest amount of time, make sure you have all of this info ready to go.
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