I am trying to back up my phone and once I go to settings etc. etc. and go to iCloud back up it says back up this phone I try to slide onto the on position, but it immediately goes back to the off position.
[Re-Titled by Moderator]
Windows, Windows 10
Perhaps use a lightning cable & PC computer, a backup
may be completed using iTunes for Windows..? Or Mac.
Backup methods for iPhone, iPad, and iPod touch - Apple Support
How to back up your iPhone, iPad, or iPod touch with iTunes on your PC - Apple Support
How to back up your iPhone, iPad, and iPod touch - Apple Support
//support.apple.com/en-us/HT203977 (more ways)
When I select iCloud to backup on iPhone it immediately goes back to off position
