Do unlocked cell phones work with any carrier?

Related questions

1. Is iPhone 7 Plus GSM or CDMA?
2. Does AT&T sell unlocked phones?
3. Can I just put my SIM card in an unlocked phone?
4. What phones are compatible with CDMA?
5. Is Verizon a GSM or CDMA network?
6. What is the difference between GSM unlocked and factory unlocked?
7. Are unlocked phones worth more?
8. How do you know if a phone is CDMA or GSM?
9. Will an unlocked GSM phone work on Verizon?
10. Can a phone be locked after being unlocked?

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