watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5545b

File Size

1.12 GB

Release Date

2018-04-16T17:04:48Z

Update Type

Normal release

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 4.3.1 (build 15T5545b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-04-16T17:04:48Z. The update package is 1.12 GB. This is a full OTA update that can be applied from any compatible base version. 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 b9aacaac2aab77224122bb28d4d42ecbf3da0f70.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-77208-20180416-B5ADCDBE-3E60-11E8-B1F1-B6FA515157AE/com_apple_MobileAsset_SoftwareUpdate/b9aacaac2aab77224122bb28d4d42ecbf3da0f70.zip