It is unlikely to be updated further and may contain duplicate or outdated information. The iPhone XS is Apple's now-retired 2018 flagship. It continued with the full-screen design and Face ID ...

This extensive iPhone user guide includes full instructions on how to use your iPhone. If you're looking for a traditional manual, this is it. Apple produces a new version for every major iOS release.

If your iPhone isn't responding and you're not able to power it off and then on again, you can force restart it to hopefully fix the issue. Forcing a restart is different than a normal restart.