watchOS 6.3.1 (17U224) for Apple Watch Series 1 (38mm) ✓ This OTA is signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
potential future use. They might also be useful if you're doing research.
Release Date February 2, 2026 Upload Date January 28, 2026 Filename 3ece5a587de6178e1c335d00f149cb88312b26b9.zip Filesize 1.4 GiB Identifier Watch2,6
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