Why can’t I back up with mobile data

See this paragraph:

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.

Extracted from:--> Back up iPhone

Regards

Giulio

Raicya wrote:

iPhone 6s

Only if you have an iPhone 12 model or later with a 5G connection you can use over the 5G network.

You can also backup your iPhone using 4G as well.

or he/she need 5G cuz they have an iPhone 6s to be able to backup?

iPhone 6s

Only if you have an iPhone 12 model or later with a 5G connection you can use over the 5G network.

Hey there,

you need to update your iPhone to the latest iOS version and then you will be able to backup your iPhone using cellular data!