watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5567a

File Size

325.95 MB

Release Date

2018-05-14T17:14:04Z

Update Type

Normal release

Delta update - requires 4.2.2 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 15T5567a) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-05-14T17:14:04Z. The update package is 325.95 MB. This is a delta (partial) update that requires 4.2.2 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 b488f989c31cfae0d9488f4053574d87de29aded.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-84238-20180514-DEC67A8C-5500-11E8-B39D-440139D97EC1/com_apple_MobileAsset_SoftwareUpdate/b488f989c31cfae0d9488f4053574d87de29aded.zip