Can I just put my SIM card in an unlocked phone?

Related questions

1. What phones are compatible with CDMA?
2. Are iPhones CDMA or GSM?
3. Is Verizon a GSM or CDMA network?
4. Can a phone be locked after being unlocked?
5. Will an unlocked GSM phone work on Verizon?
6. What is the difference between GSM unlocked and factory unlocked?
7. Does AT&T sell unlocked phones?
8. What does CDMA network mean?
9. Is iPhone 7 Plus GSM or CDMA?
10. Can I buy an unlocked phone and use it with AT&T?

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