watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5565a

File Size

87.57 MB

Release Date

2018-05-07T17:23:53Z

Update Type

Normal release

Delta update - requires 4.3.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 4.3.1 (build 15T5565a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-05-07T17:23:53Z. The update package is 87.57 MB. This is a delta (partial) update that requires 4.3.1 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 19c9a844fb4c113183deeb9f3b4c71cae847008a.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-82240-20180507-8AEF3896-4EF6-11E8-B56F-BF41CEB366E9/com_apple_MobileAsset_SoftwareUpdate/19c9a844fb4c113183deeb9f3b4c71cae847008a.zip