From within the Settings app, scroll to and tap Apps.
Tap Contacts.
Tap Import SIM Contacts.
iPhone doesn't store contacts on your SIM card, but you can import contacts from a SIM card used in a previous device.
Tap Apps.
Tap Settings.
Scroll up to and tap your profile.
Tap iCloud.
Tap See All.
Tap or slide the Contacts switch to ON.
You've completed the steps!
