watchOS 6.3.1 (17U224) for Apple Watch Series 1 (42mm) ✓ 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 42c979005267ddb0eef218c62af4a6d2a4bc7d0b.zip Filesize 1.4 GiB Identifier Watch2,7
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