How do I enable iTunes on my iPhone?

Related questions

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2. Why is my phone not connecting to iTunes?
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4. Why can't iTunes connect to my iPhone?
5. Why iPhone is not recognized on computer?
6. Why does my iPhone not connect to iTunes when I plug it in?
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Tags

1. #passcode
2. #iphone
3. #recent
4. #proper
5. #restore
6. #device
7. #backs
8. #choose
9. #synced
10. #requested
11. #launch
12. #connect
13. #before
14. #computer
15. #unlock
16. #enter
17. #backup
18. #itunes
19. #cable