It's written by BGR. What else do you expect? BGR writers are clever in the most annoying way that they exaggerate the most mundane news with the most sensationalist headlines.
They make it sound like that's it, iPhone X totally ruined T-mobile, T-mobile might as well close their doors and sell their business.
iPhone X will work juuuuust fine, just like iPhone 7, 6, 5, 4 did, just fine, using the same LTE network, fast and reliably.
And by the time their new band gets extensive support (which won't happen properly until Sep-Oct 2018), it will be time for iPhone 11, which will most definitely support the new band. Perfect timing.
Nothing to see here, BGR just talking out of their sensationalist a$$$$$$$
