http://bgr.com/2017/11/14/iphone-x-vs-galaxy-note-8-lte-speed-test-its-not-even-close/
Above you can see the tests plain and simple it may be nice, have a nice display and all. But due to various lawsuits against Qualcomm. The iPhone X just doesn't have the best Radio chipset for LTE data it simply fails at being a phone when you need it period.
Why do I need my receipt? My AT&T iPX works great!