CDMA and GSM networks are two types of cellular phone networks. Generally, if you have a phone made for one, it can't be used on the other.
In the US, Sprint and Verizon run on CDMA networks while AT&T and T-Mobile run on GSM networks.
If you are interested in purchasing a cell phone, be sure to verify that it is unlocked for the correct network!
If you want to know more about CDMA and GSM, check out our article below!
https://www.dailysteals.com/blogs/daily-nut/why-should-i-buy-an-unlocked-phone
If you're not sure which one you need the best way to know if a phone will work for you is to contact your carrier directly and ask!
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