One of the most notable new features is iCloud end-to-end encryption, which protects user information even in the event of a data breach in the cloud. Additionally, iOS 16.3 now supports physical security key-based 2-factor authentication, allowing users to further strengthen the security of their Apple ID.
The update also includes an improved emergency SOS feature and support for the 2nd generation HomePod. It's also worth mentioning that iOS 16.3 has introduced two new unity wallpapers, which can be accessed from the settings menu and the lock screen.
The update is around 600MB in size for users who are already on iOS 16.2, and it's compatible with all iPhones that support iOS 16. However, some features may be limited to the latest models.
If you own an iPhone running on iOS 16, it's recommended that you install the iOS 16.3 update to take advantage of the new features and improvements. Installing the latest software updates not just on iPhones but on all devices is important for overall stability and security.