watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5567a

File Size

48.75 MB

Release Date

2018-05-14T17:14:14Z

Update Type

Normal release

Delta update - requires 4.3.1 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 15T5567a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-05-14T17:14:14Z. The update package is 48.75 MB. This is a delta (partial) update that requires 4.3.1 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 20b4be62dc00159238a015d571f731465729e63f.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-84379-20180514-DB3D5908-5505-11E8-A348-E41F39D97EC1/com_apple_MobileAsset_SoftwareUpdate/20b4be62dc00159238a015d571f731465729e63f.zip