iOS 16.3 features
To begin with, the iOS 16.3 update will resolve an issue in which some iPhone 14 Pro/Pro Max devices briefly display horizontal lines upon waking. It will enable the use of physical security keys to protect Apple IDs, signifying that users will be able to configure a physical hardware device as the second factor of two-factor authentication for their accounts.
The update will likely fix a Freeform flaw where some drawing strokes made with an Apple Pencil or finger might not show up on shared boards. Additionally, it will correct an issue in which the Home Lock Screen widget did not accurately display the status of the Home app, as per reports. It will add support for the newly released HomePod 2nd Generation, a new Black Unity wallpaper in honour of Black History Month, along with a new tutorial that will instruct users on how to use the Handoff features that are compatible with both the iPhone and the HomePod.
iOS 16.3 update: how to install
Users will be able to install the iOS 16.3 update as soon as it becomes available over the air by going to the Settings app, selecting General from the menu, and then selecting Software Update from the submenu that appears.
In addition to iOS 16.3, the release of iPadOS 16.3, watchOS 9.3, and most likely tvOS 16.3 and macOS 13.2 are also expected.