watchOS 6.3 (17U216) for Apple Watch Series 5 (40mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date January 26, 2021 Upload Date January 14, 2021 Filename 63caaac5296a888a56fbc8cd4676f96d48b315ca.zip Filesize 1.4 GiB Identifier Watch5,1
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