How to backup without using wifi
How to backup my stuff without using wifi
iPhone 11 Pro Max, iOS 14
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How to backup my stuff without using wifi
You can backup to a computer. Apple has links to the instructions in How to back up your iPhone, iPad, and iPod touch - Apple Support
For iPhones with 5G capability - iPhone 12 or later - under certain conditions you can use phone data to backup. See Use 5G with your iPhone - Apple Support