watchOS 6.3.1 (17U224) for Apple Watch Series 5 (44mm, LTE) ✓ 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 00e2ab8723c3058f50908d7f586f4f5391a8584c.zip Filesize 1.4 GiB Identifier Watch5,4
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