watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

883.69 MB

Release Date

2019-08-26T17:16:03Z

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 5.3.1 (build 16U600) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2019-08-26T17:16:03Z. The update package is 883.69 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 74c7555ed13b8b54b47a06e449927dc1f0432a11.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-92043/F281D5B8-C501-11E9-9DAF-8023BA133A18/com_apple_MobileAsset_SoftwareUpdate/74c7555ed13b8b54b47a06e449927dc1f0432a11.zip