How long does an iOS 12 update take?

Related questions

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6. Which iPhones will get iOS 12?
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Tags

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2. #device
3. #minutes
4. #shows
5. #below
6. #internet
7. #storage
8. #speed
9. #specific
10. #about
11. #according
12. #version
13. #sheet
14. #iphone
15. #update