watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5565a

File Size

67 MB

Release Date

2018-05-07T17:23:25Z

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 1 (42mm) →

About This Update

watchOS 4.3.1 (build 15T5565a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-05-07T17:23:25Z. The update package is 67 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 a0da6aedf69d9818c660bfc6a42517603d9c83b3.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-82071-20180507-05B797FE-4EF6-11E8-B705-4C25CEB366E9/com_apple_MobileAsset_SoftwareUpdate/a0da6aedf69d9818c660bfc6a42517603d9c83b3.zip