Apple today seeded the third beta of an upcoming iOS 11.3 update to developers for testing purposes, two weeks after seeding the second beta and one month after releasing iOS 11.2.5, an update that focused primarily on bug fixes and security improvements. The update also comes just a day after the release of iOS 11.2.6, which fixed a bug that caused iPhones and iPads to crash when a character from the Indian language Telugu was rendered improperly.
Registered developers can download the new iOS 11.3 beta from Apple's Developer Center or over-the-air once the proper configuration profile has been installed from the Developer Center.
Watch on YouTubeiOS 11.3 is a major update that introduces a long list of new features, like Messages on iCloud for storing your iMessages in the cloud, and ARKit 1.5, a new, upgraded version of ARKit that can more accurately map irregularly shaped surfaces and recognize and place objects on vertical surfaces like walls.
There are four new Animoji on the iPhone X (dragon, bear, skull, and lion), and in the Health app, there's a new Health Records feature that aggregates all of your medical records in one easy-to-access place. Health Records are limited to participating institutions, though.

AirPlay 2 features have been introduced in iOS 11.3 and tvOS 11.3, allowing audio to be played to multiple Apple TVs, and for HomeKit, iOS 11.3 introduces official support for HomeKit software authentication options.
As of iOS 11.3 beta 2, the update includes a new "Battery Health" feature that's designed to provide iOS users with more information about their batteries.
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