Apple has released the fourth betas of iOS 11.3 and tvOS 11.3 to registered developers. While iOS 11.3 adds a few interesting new features, the fourth beta seems to mostly consist of bug fixes and relatively minor improvements, following the introduction of the battery health feature in iOS 11.3 beta 2. 9to5Mac found that the new code adds support for Brazilian Portuguese to the TV app, hinting that that app could be released in Brazil soon. There’s also no sign of the return of AirPlay 2 — removed in iOS 11.3 beta 3 — and the release notes still make no mention of it, so it’s unclear whether these are coming back in a future iOS 11.3 beta or will be pushed off to a later release.