watchOS 5.1.3 (16S5531a) for Apple Watch Series 2 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date December 19, 2018 Upload Date December 17, 2018 Filename 04118e32923602c0865112c26229521080f4a148.zip Filesize 1.3 GiB Identifier Watch2,3
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