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Some Sky Pros are issued by Tracfone, meaning Total Wireless, Straight Talk, Tracfone, Simple Mobile. TW, TP, and ST most likely are CDMA bands using Verizon towers. Simple Mobile, most likely T-Mobile, possibly ATT. You would need to check the model number that you see on box, or that is disclosed in Settings, About Phone. Place that in Search Engine. It will tell you who it was sold by. Then call that carrier to get it unlocked to use on compatible MVNOs. You can't cross GSM phones to CDMA towers.
Sorry, there was a problem. Please try again later.Go to the carrier of your choice website (Google) and see what phones are compatible with Their service
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