Do cell phones use DTMF?

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Tags

1. #menus
2. #phones
3. #digits
4. #direct
5. #global
6. #using
7. #audible
8. #standard
9. #instead
10. #digital
11. #navigate
12. #tones
13. #phone
14. #dialing
15. #keypad
16. #mobile
17. #calling
18. #networks
19. #still
20. #represent
21. #automated
22. #secondary
23. #signals
24. #systems