There are differences between CDMA and GSM that have practical implications on what carrier or cell phone you choose to use in the USA (and Canada). What are these differences and which US carriers use either technologies?

There are differences between CDMA and GSM that have practical implications on what carrier or cell phone you choose to use in the USA (and Canada). What are these differences and which US carriers use either technologies?
The BLU S1 is a global smartphone with support for both GSM and CDMA mobile networks. It has 4G LTE support too, runs Android 7
MTN Nigeria has been working hard to acquire Nigeria’s last standing CDMA operator, Visafone, and according to information filtering in, they have finally succeeded. This