watchOS 5.1 (16R5577c) for Apple Watch Series 4 (40mm, LTE) ✗ 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 9, 2018 Upload Date October 5, 2018 Filename 36915bbe9c39ab0afc151d932e8e47435b7a2835.zip Filesize 1.4 GiB Identifier Watch4,3
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