watchOS 5.3.1

watchOS

Version

5.3.1

Build ID

16U600

File Size

218.76 MB

Release Date

2019-08-26T17:15:54Z

Update Type

Normal release

Delta update - requires 5.2 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 2019-08-26T17:15:54Z. The update package is 218.76 MB. This is a delta (partial) update that requires 5.2 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 590de7d16e6612febc00f8f303066e44c54d1774.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerFCS/patches/041-91969/96633650-C501-11E9-85AB-ED4B48F976D9/com_apple_MobileAsset_SoftwareUpdate/590de7d16e6612febc00f8f303066e44c54d1774.zip