No problem to my iPhone if I update
What is deference
iPhone 6s Plus, iOS 13
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Best reply
Your profile shows you are using IOS 13 which is the latest IOS version. You can update to the latest version of IOS 13 and that is all you can do to update at this time.
Get help with over-the-air iOS updates
Update – Can’t or can’t restore
Have you tried using iTunes on a computer or Finder if running Catalina to do the update?
If you see an error when you update or restore your iPhone, iPad, or iPod