watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

499.6 MB

Release Date

2019-08-26T17:15:53Z

Update Type

Normal release

Delta update - requires 5.1.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm, LTE) →

About This Update

watchOS 5.3.1 (build 16U600) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-08-26T17:15:53Z. The update package is 499.6 MB. This is a delta (partial) update that requires 5.1.2 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 ea072834ce7ba153bd0ca49a4b62c796dcb56c3b.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-92160/C72C0E7E-C501-11E9-946B-54DF51566A18/com_apple_MobileAsset_SoftwareUpdate/ea072834ce7ba153bd0ca49a4b62c796dcb56c3b.zip