watchOS 4.3.1

watchOS

Version

4.3.1

Build ID

15T5535b

File Size

361.98 MB

Release Date

2018-04-02T17:13:36Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

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

About This Update

watchOS 4.3.1 (build 15T5535b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-04-02T17:13:36Z. The update package is 361.98 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 6e31e98be03ee4c210022cd2bec646efd6d1acb9.zip.

Direct URL

http://updates-http.cdn-apple.com/2018/watchosseed/091-75315-20180402-BA56BA14-32EF-11E8-9512-6C8D50D38548/com_apple_MobileAsset_SoftwareUpdate/6e31e98be03ee4c210022cd2bec646efd6d1acb9.zip