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 an issue that could affect cellular connectivity in Turkey for iPhone XR, iPhone XS, and iPhone XS Max.
iPhone 8 Plus and iPhone 7 Plus
iPhone 6s Plus and iPhone 6 Plus
iOS 12.1.2 is available for iPhones only, not iPads. Download iOS 12.1.1 for iPads.