Apple has started rolling out iOS 15.4 and iPadOS 15.4 for compatible models. This new update includes several minor changes, along with a major update to Face ID.
The iOS 15.4 and iPadOS 15.4 updates can be downloaded for free. To access the new software, go to Settings > General > Software Update.
iOS 15.4 adds an option to use Face ID while wearing a mask. iPadOS 15.4 introduces Universal Control, allowing multiple Macs and iPads to be controlled with the same mouse/trackpad and keyboard.
Universal Control requires all participating iPad and Mac devices to be running iPadOS 15.4 and macOS Monterey 12.3 or later, respectively.
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15.4 also includes over 100 new emoji from the Emoji 14.0 set, a new voice option for Siri along with the ability to provide time and date information offline, EU Digital Covid-19 certificate support in vaccine cards in Apple Wallet.
In addition, Apple has also released watchOS 8, macOS Monterey 12.3, tvOS 15.4, and HomePod Software 15.