What is iOS device ID?

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Tags

1. #numbers
2. #customers
3. #downloading
4. #device
5. #associated
6. #apple
7. #number
8. #unique
9. #digit
10. #letters
11. #access
12. #iphone
13. #sequence
14. #itunes
15. #touch
16. #store
17. #their
18. #known
19. #every