Full Review CNET Rating 4.5 out of 5 4.5 Scott Stein December 22, 2017 Apple iPhone X Review I arrived late from my first day of testing of iPhone X.Band classes were assigned by a wireless standard organization to ensure that the manufacturers use the same specifications when developing components for devices. While they include Volume 66, used by T-Mobile and Verizon, they are missing the new T-Mobile 71 band that the operator expands national coverage. (Currently, just have LG V30 Volume 71.) There is no word if the phone supports Sprint HPUE technology. In the case of LTE, it is not enough to look for the frequency, as some operators use different splitters of the same frequency for their LTE networks. Your best bet to buy it, the new SIM-free Unlocked iPhone X model to avoid buying a brand new iPhone X, if you ever had the flexibility to switch to Verizon or Sprint. Are All Iphones Unlocked To Any Network.