watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T567

File Size

680.4 MB

Release Date

2018-05-29T17:09:01Z

Update Type

Normal release

Delta update - requires 3.0 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 2018-05-29T17:09:01Z. The update package is 680.4 MB. This is a delta (partial) update that requires 3.0 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 ad2738cbd8b98d649c27a33a08164ff5b0ab60a6.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchos/091-65695-20180529-78626142-5AB5-11E8-B18E-5A9946B84F26/com_apple_MobileAsset_SoftwareUpdate/ad2738cbd8b98d649c27a33a08164ff5b0ab60a6.zip