watchOS 5.1 (16R5559d) for Apple Watch Series 1 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date September 18, 2018 Upload Date September 14, 2018 Filename 9e5e0bb95b80d98e9a6ccccf87d133d17f29c59c.zip Filesize 1.2 GiB Identifier Watch2,6
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