watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

511.59 MB

Release Date

2019-08-26T17:17:09Z

Update Type

Normal release

Delta update - requires 5.0.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm, LTE) →

About This Update

watchOS 5.3.1 (build 16U600) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-08-26T17:17:09Z. The update package is 511.59 MB. This is a delta (partial) update that requires 5.0.1 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 80e4e2c31b364191251b044069a9da25171e0ff8.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-91884/24EF1FC0-C501-11E9-B4B3-8026A7FEA4BA/com_apple_MobileAsset_SoftwareUpdate/80e4e2c31b364191251b044069a9da25171e0ff8.zip