What good is it if you get the T-mobile model and later you choose to switch carriers and want to go on Verizon? Your screwed because T-mobile Model will not work on CDMA networks at all. Period.Why don't you just get the Tmobile version? Historically, the Verizon version works on Tmobile's network, but speeds could not be fully unlocked.
T-Mobile and Att model will not work on verizon or Sprint network. This is because the att/t-mobile has the intel modem, which is GSM only. I'm aware that they now have license to use CDMA but they aren't using it this time around. Verizon and Sprint uses CDMA technology.Actually that T-Mobile and AT&T iPhone X will still work on Verizon. I found a page comparing all the 3 iPhone X model numbers A1865, A1901, A1902
https://www.techwalls.com/iphone-x-models-a1865-a1901-a1902-differences/
Hope it clarifies your concern.
T-Mobile and Att model will not work on verizon or Sprint network. This is because the att/t-mobile has the intel modem, which is GSM only. I'm aware that they now have license to use CDMA but they aren't using it this time around. Verizon and Sprint uses CDMA technology.