watchOS 5.1 (16R591) for Apple Watch Series 2 (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 October 30, 2018 Upload Date October 22, 2018 Filename 54bdc9558da13658f97e239417e71a89897ece52.zip Filesize 1.3 GiB Identifier Watch2,4
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