Why is there an error installing iOS 12?

Related questions

1. What are the new features of iOS 12?
2. Does iphone6 support iOS 12?
3. Why can I not update my iPhone?
4. Is my iPad compatible with iOS 12?
5. Can you update an old iPad to iOS 11?
6. Is it worth buying iPhone 6s in 2018?
7. What's coming in iOS 12?

Tags

1. #error
2. #problem
3. #update
4. #unable
5. #turned
6. #network
7. #under
8. #installing
9. #cellular
10. #general
11. #check
12. #install
13. #chances
14. #settings
15. #occurred
16. #there
17. #reset
18. #cause