The iOS 16.1.2 update can be downloaded on eligible iPhones over-the-air by going to Settings > General > Software Update.
According to Apple's release notes, the iOS 16.1.2 update introduces improved compatibility with wireless carriers along with Crash Detection optimization on the iPhone 14 and iPhone 14 Pro models.- Crash Detection optimizations on iPhone 14 and iPhone 14 Pro models.
Crash Detection optimization could perhaps involve improvements to prevent the iPhone 14 models from calling emergency services when users are enjoying rollercoasters and other intense rides.