watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T567

File Size

331.86 MB

Release Date

2018-05-29T17:09:06Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 4.3.1 (build 15T567) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-05-29T17:09:06Z. The update package is 331.86 MB. This is a delta (partial) update that requires 4.2.3 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 33f991ec1a37097783327ca49f96a96b177c7e2d.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchos/091-75824-20180529-7C2154DA-5AB7-11E8-A5E3-7F2E42FD93D5/com_apple_MobileAsset_SoftwareUpdate/33f991ec1a37097783327ca49f96a96b177c7e2d.zip