How does contactless phone payment work?

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Tags

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2. #transaction
3. #enabled
4. #phone
5. #order
6. #technology
7. #special
8. #sticker
9. #completed
10. #payment
11. #using
12. #communications
13. #field
14. #payments
15. #attached
16. #contactless
17. #mobile
18. #systems
19. #called
20. #based