watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5565a

File Size

361.88 MB

Release Date

2018-05-07T17:23:26Z

Update Type

Normal release

Delta update - requires 4.2 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 15T5565a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-05-07T17:23:26Z. The update package is 361.88 MB. This is a delta (partial) update that requires 4.2 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 afb5a61368711724be23593332e296716134d8d4.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-82091-20180507-1B0BF302-4EF6-11E8-B41E-122ACEB366E9/com_apple_MobileAsset_SoftwareUpdate/afb5a61368711724be23593332e296716134d8d4.zip