watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5535b

File Size

122.18 MB

Release Date

2018-04-02T17:13:32Z

Update Type

Normal release

Delta update - requires 4.3 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 15T5535b) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-04-02T17:13:32Z. The update package is 122.18 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 bfa0c3ae7e01ec316f1e82134fee502b1615f7f0.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-75358-20180402-E594C3E2-32EF-11E8-BE34-B09650D38548/com_apple_MobileAsset_SoftwareUpdate/bfa0c3ae7e01ec316f1e82134fee502b1615f7f0.zip