Hello user, I have a sim card with unlimited data plans. My iPhone 6 Plus connect to the iPhone X wifi personal hotspot network. If create on my iPhone 6 Plus a manually iCloud Backup (Settings -> iCloud -> Create Backup). Then is the iCloud Backup not created = not working. I think iOS 11 not supports create an iCloud Backup from iOS wifi personal hotspot network. My very old Android device Samsung Galaxy S2 with Android wifi personal hotspot network no a problem. iPhone 6 Plus created this manually iCloud Backup without problems. Can you help me?? How I can fix this?