watchOS 5.1.3 (16S5531a) for Apple Watch Series 3 (42mm) ✗ This OTA is not 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 December 19, 2018 Upload Date December 17, 2018 Filename b6b6782ce393d5dd0ce4ece0b1847e040a61ce41.zip Filesize 1.3 GiB Identifier Watch3,4
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