How do you know if a phone is unlocked?

Related questions

1. Which carriers use CDMA network?
2. Can you cut the gold part of a SIM card?
3. What is the code to unlock a Verizon phone?
4. Can I put my SIM card in another phone?
5. Can a Verizon phone be used on MetroPCS?
6. Is Metro PCS a CDMA network?
7. Can I bring my own tablet to Metro PCS?
8. Does MetroPCS offer WiFi?
9. Does switching SIM cards transfer pictures?
10. What is a 3 in 1 SIM card?

Tags

1. #unlocked
2. #probably
3. #making
4. #service
5. #check
6. #carrier
7. #locked
8. #unlock
9. #telling
10. #dialog
11. #enter
12. #purchased
13. #originally
14. #phone
15. #greeted
16. #another
17. #valid