Apple has released iOS 13.3.1, iPadOS 13.3.1, tvOS 13.3.1, and watchOS 6.1.2.. You can download the first two on your iPhone or iPad by going to Settings > General > Software Update.
According to Apple’s release notes, iOS 13.3.1:
Fixes an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
– Adds a setting to control the use of location services by the U1 Ultra Wideband chip
– Addresses an issue that could cause a momentary delay before editing a Deep Fusion photo taken on iPhone 11 or iPhone 11 Pro
– Resolves an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
– Fixes an issue that could cause multiple undo dialogs to appear in Mail
– Addresses an issue where FaceTime could use the rear facing ultra-wide camera instead of the wide camera
– Resolves an issue where push notifications could fail to be delivered over Wi-Fi
– Addresses a CarPlay issue that could cause distorted sound when making phone calls in certain vehicles
– Introduces support for Indian English Siri voices for HomePod.
Apple says iPadOS 13.3.1:
– Fixes an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
– Addresses an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
– Fixes an issue that could cause multiple undo dialogs to appear in Mail
– Resolves an issue where push notifications could fail to be delivered over Wi-Fi
– Introduces support for Indian English Siri voices for HomePod.
I’m not sure what tvOS 13.3.1 and watchOS 6.1.2 provide other than stability improvements. To download the former on your Apple TV (if it doesn’t update automatically), launch the System menu via the set-top box and choose Software Update.
watchOS 6.1.2 doesn’t include any new features, but provides performance improvements and bug fixes. To install it, launch the Watch app on your iPhone and go to General > Software Update.
