Why WhatsApp is popular?

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Tags

1. #whatsapp
2. #recorded
3. #service
4. #think
5. #messaging
6. #documents
7. #enormously
8. #voice
9. #facebook
10. #location
11. #messages
12. #first
13. #people
14. #allows
15. #smartphone
16. #images
17. #popular
18. #calls
19. #install
20. #users
21. #video
22. #owned
23. #their