Apple has issued an update to iOS 12, which fixes several bugs that have plagued iPhone XS and XS Max users since the phones were released. The IOS 12.0.1 update is available to download now in Settings —> General —> Software Update on your iPhone or iPad.
The update should fix one of the biggest issues on the iPhone XS and XS Max: users reported poor Wi-Fi reception compared to their previous iPhone X devices when used in their homes, but it doesn’t address the separate LTE issues. It also resolves the widespread issue of iPhone XS devices requiring to be unlocked before recognizing the Lightning cable charger. There’s also a slightly lesser-known issue with the iPad keyboard that’s being fixed. – The Verge