watchOS 5.3.10

watchOS

Version

5.3.10

Build ID

16U711

File Size

1.37 GB

Release Date

2026-03-24T18:36:54Z

Update Type

Normal release

Download OTA

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

About This Update

watchOS 5.3.10 (build 16U711) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2026-03-24T18:36:54Z. The update package is 1.37 GB. This is a full OTA update that can be applied from any compatible base version. This update is currently signed by Apple, so it can be applied directly from Settings › General › Software Update.

The OTA payload file is 893009c0b14fa7d0f8957a66069d9b6de54867d4.zip.

Direct URL

https://updates.cdn-apple.com/2025FallFCS/patches/047-73038/21DE9044-930A-4AA7-AB01-6C62DB0B3EBD/com_apple_MobileAsset_SoftwareUpdate/893009c0b14fa7d0f8957a66069d9b6de54867d4.zip