Everything New in iOS 16 Beta 4 for Lock Screen, iMessage, CarPlay, and More

apple today launched the fourth beta version of iOS 16 to developers for testing. The latest beta contains a handful of new features and changes to the Messages app, Home app, Mail app, lock screen notifications, CarPlay, and more.

iOS 16 is currently in beta for developers and Apple Free Tier members public beta testing program, and the software update will be released for all users with an iPhone 8 or newer in September. A second public beta of iOS 16 that matches today’s fourth developer beta will likely be released next week.

We’ve outlined notable new features and changes in iOS 16 beta 4 below. Thanks to Steve Moser and @AppleSWUpdates for their contributions.

iMessage Edit/Undo Sending Changes

iPhone 13 Editable Messages Feature
You can now tap the little “Edited” label under an edited iMessage bubble to show the original version of the message and all other previous changes. Additionally, iMessages can now only be edited a total of five times before the “Edit” option disappears.

While there’s still a 15-minute window to edit an iMessage, Apple has reduced the time to unsend an iMessage to two minutes after it’s delivered.

Live Activities API

ios 16 live activities feature


Apple has released ActivityKit in betaallowing developers to start testing the Live Activities on Lock Screen feature in their apps on the iOS 16 beta. For now, apps that implement the feature will only be available through TestFlight.

Live Activities will provide real-time viewable information on the lock screen. For example, a sports application may allow the user to start a live activity for a live sports match. In this scenario, Live Activity would appear on the lock screen for the duration of the game and offer the latest game updates at a glance.

Apple says Live Activities won’t be included in the initial publicly released version of iOS 16, with the feature expected to be enabled in an update later this year – possibly iOS 16.1. At that time, apps with live activities will be available in the App Store.

New wallpapers in the Home app

iOS 16 Beta 4 wallpaper feature


The fourth iOS 16 beta adds new Wildflowers and Architectural wallpapers to choose from in the Home app, alongside existing wallpapers.

New deadlines for unsending mail

iOS 16 Beta 4 Unsend Feature


In the Mail app on iOS 16, it’s briefly possible to unsend an email in the Mail app. In the first three betas, the delay to unsend an email was 10 seconds, but the fourth beta gives users options of 10, 20, or 30 seconds.

Lock screen notification settings

iOS 16 beta 4 notification feature


Apple has improved the appearance of the lock screen notification options in the Settings app. In the fourth beta of iOS 16, Apple now includes images that visualize Count, Sack, and List options for displaying lock screen notifications.

New lock screen customization interface

Apple revamped the interface when customizing the lock screen, with options for colors, gradients, photos, and more. downstairs.

iOS 16 Beta 4 Lock Screen Customizer

Bolder music player on lock screen

Apple has updated the music player on the lock screen with bolder elements.

iOS 16 beta 4 music player

New wallpapers for CarPlay

A static version of the iOS 16 iPhone wallpaper is now available for CarPlay, with multi-color, blue, and gray options to choose from.

Other Changes

If you spot any other changes, let us know in the comments section.

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