One of the easiest new changes to spot is the new Emergency SOS alert that appears when accessing the Settings app. Users can find View Emergency SOS Alerts under the iCloud Preferences pane at the root of the Settings app. This alert prompt takes the user directly to Settings → Emergency SOS and serves as a way to review emergency contact settings and update or add to these contacts if needed. Emergency SOS is also where users can set the Emergency SOS emergency services trigger by holding down the side and volume buttons or pressing the side button five times in a row.
Users have been able to download OTA updates over 5G since the iPhone 12, but today's iOS 15.4 appears to allow some users in previously unsupported locations to download over Cellular LTE Download updates.
The Magnifier app received several updates to its lens selection UI during beta, gaining auto, close-up, and front-facing in beta 3 New icon for lens selection.
New preference for TV app found in Settings → TV → Previous Show initially Appeared in the first iOS 15.4 beta, but changing the settings had no effect. In iOS 15.4 beta 3, you'll notice a noticeable change when switching between still frames of paused images and promotional poster artwork in the TV app.
A new Apple Podcasts splash screen highlights two new features introduced in the previous iOS 15.4 beta - podcast filters and episode browsing.
You can now filter your subscribed podcasts to show unplayed or downloaded episodes. The new filter feature can be accessed by clicking the "Episodes" drop-down menu on the main podcast show page.
In addition to being able to filter podcasts by episode, you can also browse seasons to find shows with season metadata. You can quickly choose between multiple seasons using the same episode drop-down menu on the main show page. After selecting a season, the podcast app allows you to continue filtering by episodes.
Settings → Schedule Summary in Notifications now breaks down the apps in the summary by weekly notification average instead of daily notification average.
To make it easier to access Universal Control options, Apple has added a new “Universal Control” button in System Preferences → Displays The Advanced button is replaced by the Universal Control button. Behind this button you'll find the three main Universal Control settings. Be sure to check out our in-depth Universal Controls walkthrough to learn all the fun details.
In what may be the most important part of yesterday's beta update, there is no new Xcode 13.3 beta available for download, This is usually a sign that a hardware update is around the corner. Given that Apple is rumored to be holding an event on March 8, it could be weeks before we see the new Xcode beta.
It looks like all the major changes in iOS 15.4 are happening in the initial beta version. This release includes updates to two key features: Face ID unlocking while wearing a face covering and Universal Controls for iPadOS/macOS. As iOS 15.4 nears public release, updates like iOS 15.4 beta 3 will continue to address bugs and make minor changes.
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