watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T6567

File Size

117.06 MB

Release Date

2018-05-29T17:09:21Z

Update Type

Normal release

Delta update - requires 4.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 4.3.1 (build 15T6567) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-05-29T17:09:21Z. The update package is 117.06 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 8bc75f220f232c5b801d145b18b26a6f0a2e13ff.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchos/091-76040-20180529-5092F336-5AB8-11E8-842F-A43C42FD93D5/com_apple_MobileAsset_SoftwareUpdate/8bc75f220f232c5b801d145b18b26a6f0a2e13ff.zip