Set up your iPhone to use iCloud with the Photos app
There are three different iCloud features you can turn on for Photos: iCloud Photos, Shared Albums and My Photo Stream.
For an overview of the different iCloud features available for Photos, see Use iCloud with the Photos app.
On your iPhone, go to Settings > [your name] > iCloud > Photos.
If you are asked to sign in, enter your Apple ID and password. If you do not have one, tap Create Apple ID, then follow the instructions.
Select any of the following features to turn them on:
To set up your other devices, see Set up your devices to use iCloud with the Photos app.