Download or bookmark the iPhone User Guide
You can view the iPhone User Guide in the Safari app , or download it to the Books app so you can read it even when you’re offline.
View the user guide in Safari
In Safari, go to https://support.apple.com/guide/iphone.
To view the user guide in a different language, scroll down to the bottom of the page, tap the region link (United States, for example), then choose a region.
Tip: For quick access, add the guide as a shortcut on your Home screen or as a bookmark in Safari. Tap , then choose any of the following:
Add to Home Screen: The shortcut appears as a new icon on the Home screen.
Add Bookmark: The bookmark appears when you tap in Safari.
Download the user guide from Apple Books
If you download the user guide from Apple Books, you can read it even when iPhone isn’t connected to the Internet.
Open the Books app .
Tap Search, then enter “iPhone User Guide for iOS 12.3.”
Tap Get, then wait for the book to download.