watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5565a

File Size

143.38 MB

Release Date

2018-05-07T17:22:50Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

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

About This Update

watchOS 4.3.1 (build 15T5565a) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2018-05-07T17:22:50Z. The update package is 143.38 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 c26626a1456b03ae3b2b6b40b15d99749d64d62f.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-82094-20180507-1C0FD746-4EF6-11E8-8C40-5D2ACEB366E9/com_apple_MobileAsset_SoftwareUpdate/c26626a1456b03ae3b2b6b40b15d99749d64d62f.zip