watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5565a

File Size

345.35 MB

Release Date

2018-05-07T17:23:41Z

Update Type

Normal release

Delta update - requires 4.1 installed first.

Download OTA

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

About This Update

watchOS 4.3.1 (build 15T5565a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-05-07T17:23:41Z. The update package is 345.35 MB. This is a delta (partial) update that requires 4.1 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 994eed79bca36a6d45b3393098721881da96e60c.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-82130-20180507-3AF38130-4EF6-11E8-9CBE-2430CEB366E9/com_apple_MobileAsset_SoftwareUpdate/994eed79bca36a6d45b3393098721881da96e60c.zip