Open the Files app
Tap Browse
Select a location such as iCloud Drive, On My iPhone, or a connected service
Tap the file you want to open
If prompted, choose an app to open the file
Use the search bar to find a file quickly
Open files from Mail, Messages, Safari, or other apps by tapping the file attachment or download
Tap and hold a file for more options
Use the Recents tab to access recently opened files