watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5535b

File Size

308.34 MB

Release Date

2018-04-02T17:13:04Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

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About This Update

watchOS 4.3.1 (build 15T5535b) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2018-04-02T17:13:04Z. The update package is 308.34 MB. This is a delta (partial) update that requires 4.2.3 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 6669175c5d236992f153ddad24114689e7e3bf4b.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-75308-20180402-AD2E08EC-32EF-11E8-8204-CE8B50D38548/com_apple_MobileAsset_SoftwareUpdate/6669175c5d236992f153ddad24114689e7e3bf4b.zip