Can't sign into my iCloud
Can't sign in to my iCloud
iPhone 7, 10
Can't sign in to my iCloud
iPhone 7, 10
Two ways:
iCloud: Use iCloud.com - Apple Support
https://support.apple.com/kb/PH2610
Before you begin, update your device to the latest iOS.
When you use iOS 10.3 or later, you sign in to iCloud, the iTunes & App Store, iMessage, FaceTime, and your other Apple services in one place.

Sign in with your Apple ID - Apple Support
https://support.apple.com/en-in/HT204053
Two ways:
iCloud: Use iCloud.com - Apple Support
https://support.apple.com/kb/PH2610
Before you begin, update your device to the latest iOS.
When you use iOS 10.3 or later, you sign in to iCloud, the iTunes & App Store, iMessage, FaceTime, and your other Apple services in one place.

Sign in with your Apple ID - Apple Support
https://support.apple.com/en-in/HT204053
Can't sign into my iCloud