Icloud Backup could not be completed

DraconasRaa wrote:

I'm trying to backup my iphone 14 pro max to transfer to a iphone 15 pro max. The 14 is on the latest update and the 15 is brand new out the box. The 14 had an icloud back up that said over 100 gb initially using the transfer option, and it failed to transfer, so I deleted the backup and turned off icloud back up and restarted the phone. Turned the back up back on, and now it wont backup at all. Signing out and back into my icloud account didn't help either.

If you can't back up to iCloud - Apple Support