watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5567a

File Size

134.36 MB

Release Date

2018-05-14T17:14:13Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm, LTE) →

About This Update

watchOS 4.3.1 (build 15T5567a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-05-14T17:14:13Z. The update package is 134.36 MB. This is a delta (partial) update that requires 4.3 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 13be196f69d2589d57104d290e0170455d3fb0e6.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-84359-20180514-310CE3B0-5503-11E8-9A97-D51939D97EC1/com_apple_MobileAsset_SoftwareUpdate/13be196f69d2589d57104d290e0170455d3fb0e6.zip