watchOS 5.3.9

watchOS

Version

5.3.9

Build ID

16U693

File Size

474.66 MB

Release Date

2021-01-26T18:27:01Z

Update Type

Normal release

Delta update - requires 5.1.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm, LTE) →

About This Update

watchOS 5.3.9 (build 16U693) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2021-01-26T18:27:01Z. The update package is 474.66 MB. This is a delta (partial) update that requires 5.1.3 to already be installed on the device - it cannot be applied from scratch. This update is currently signed by Apple, so it can be applied directly from Settings › General › Software Update.

The OTA payload file is ad854bac7ab5b59b2d63ce71c14732dfff4b4a98.zip.

Direct URL

http://updates-http.cdn-apple.com/2020FallFCS/patches/001-53866/F9C8C4AF-406F-4217-BE2C-C6D6AC2BF7A6/com_apple_MobileAsset_SoftwareUpdate/ad854bac7ab5b59b2d63ce71c14732dfff4b4a98.zip