Apple has released iOS 12.0.1 bringing fixes for charging and Wi-Fi issues discovered in iOS 12.0.
iOS 12.0.1 includes bug fixes and improvements for your iPhone or iPad.
This update: ● Fixes an issue where some iPhone XS devices did not immediately charge when connected to a Lightning cable ● Resolves an issue that could cause iPhone XS devices to rejoin a Wi-Fi network at 2.4GHz instead of 5GHz ● Restores the original position of the “.?123" key on the iPad keyboard ● Fixes an issue where subtitles may not appear in some video apps ● Addresses an issue where Bluetooth could become unavailable