How do I back my phone up with data
How do I back up my phone with mobile data
iPhone XS Max, iOS 14
For information about backing up to iCloud with mobile data, see the following from: Back up iPhone - Apple Support
Note: On models that support 5G, your carrier may give you the option to back up iPhone using your cellular network. Go to Settings > [your name] > iCloud > iCloud Backup, then turn on or off Backup Over Cellular.