How to Find iPhone XS and iPhone XS Max UDID

I cannot add a provisioning profile to my new Phone Xs, because I updated from iOS 12.0 to 12.01 (I think)
I also found that the information screen does NOT include the iPhone UDID.

This link shows how to get it:

Is anyone else having trouble with provisioning profiles and iOS12?

I managed to get Xcode 10 working by setting the environment to use Xcode 9.4.1 command line tools

Hope this helps.