What is the point of dual SIM?

Related questions

1. How does XS dual SIM work?
2. Does iPhone Xs work in Japan?
3. Does a dual SIM phone have 2 numbers?
4. What is E Sim in iPhone XS?
5. How do you add a second SIM card to an iPhone XS?
6. Will iPhone XS Max work in India?
7. How does eSIM work on iPhone XS Max?
8. What's new on the iPhone XS Max?
9. How do I know if my phone is dual SIM?
10. How does a dual SIM work?

Tags

1. #ability
2. #different
3. #phone
4. #calls
5. #means
6. #callers
7. #lines
8. #toggle
9. #support
10. #texts
11. #receive
12. #conversation
13. #active
14. #button
15. #single
16. #between