

iPhone Xs
iPhone Xs Max
iPhone X?If the option to use Small Caps is not available, then both the X and S or R are to be stylized in fully capitalized letters:
iPhone XS
iPhone XS Max
iPhone XRIn other words: iPhone Xs, iPhone Xs Max, and iPhone Xr with the final letter being lowercase is incorrect styling.
This might seem like trivial information to report, but there has been quite a bit of confusion over the past week in relation to the proper names of the latest iPhone models. Apple didn't help the situation, using everything from XS to Xs to Xs in Small Caps on its product pages, press releases, and support documents. Sometimes, the S and R are even in squares.
The final answer, we're told, is caps XS and XR. Apple even updated its iOS 12 press release, changing Xs and Xr to XS and XR:
iPhone names solved!I've received official confirmation that it is iPhone XS / iPhone XS Max / iPhone XR, capitalized, unless Small Caps are available, in which case it is iPhone Xs / iPhone Xs Max / iPhone X?. Apple even updated its iOS 12 press release with caps XS and XR. pic.twitter.com/sQpxb4HSRv - Joe Rossignol (@rsgnl) September 18, 2018
Now, we can move on.
Article Link: Apple Clarifies Formatting of iPhone XS, iPhone XS Max, and iPhone XR Names