Apple just released an update for iOS. Browse to Settings -> General -> Software Update to download the latest version.
New Features in the Latest Version of iOS:
*iOS 12.1.2 includes bug fixes for your iPhone. This Update:
*Fixes bugs with eSIM activation for iPhone XR, iPhone XS, and iPhone XS Max
*Addresses and issue that could affect cellular connectivity in Turkey for iPhone XR, iPhone XS, and iPhone XS Max
Please use the comments below to report problems or issues since installing this version of the app.