watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5567a

File Size

146.98 MB

Release Date

2018-05-14T17:13:48Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 2 (38mm) →

About This Update

watchOS 4.3.1 (build 15T5567a) is an official Apple over-the-air update for the Apple Watch Series 2 (38mm), released on 2018-05-14T17:13:48Z. The update package is 146.98 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 712e8112621fe5392c2c0687b1524cf94b86c430.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-84327-20180514-C022C926-5502-11E8-931F-BD1339D97EC1/com_apple_MobileAsset_SoftwareUpdate/712e8112621fe5392c2c0687b1524cf94b86c430.zip