Apple officially started to sell unlocked, SIM-free iPhone X in the US. Till date iPhone X was available from major US carrier, T-Mobile, Verizon, AT&T, or Sprint with their sim cards. With the unlocked version iPhone X, it can be used with all carriers in US. Unlocked version 64GB model cost $999 and 256GB model cost $1,149, Company says that phone will be ship both the models in 5 business days.
In case you’re wondering, both the SIM-free, and the carrier-specific iPhone X versions that Apple is selling on its official website come unlocked, if you’re paying their full price upfront (though carrier versions are shipped with SIM cards anyway).