watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T567

File Size

315.47 MB

Release Date

2018-05-29T17:08:21Z

Update Type

Normal release

Delta update - requires 4.2.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch (38mm) →

About This Update

watchOS 4.3.1 (build 15T567) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2018-05-29T17:08:21Z. The update package is 315.47 MB. This is a delta (partial) update that requires 4.2.2 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is 51e723663520b7c85cac151c9d863b466399388d.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchos/091-65720-20180529-C1AE264C-5AB5-11E8-B6AE-BB9F46B84F26/com_apple_MobileAsset_SoftwareUpdate/51e723663520b7c85cac151c9d863b466399388d.zip