I was really hoping there would be one universal version this year like there was with the 6S, but once again there are going to be two models of the iPhone X, one with a CDMA modem and one without.
This means that if you get the ATT or T-Mobile versions, you won't be able to switch your carrier to Verizon or Sprint. Also, the iPhones with CDMA typically use Qualcomm modems and have better performance.
This means that if you get the ATT or T-Mobile versions, you won't be able to switch your carrier to Verizon or Sprint. Also, the iPhones with CDMA typically use Qualcomm modems and have better performance.