watchOS 5.1 (16R5584a) 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 October 15, 2018 Upload Date October 11, 2018 Filename 8a0ac55d09c74c43cb924ba5b5cde36b580aef4a.zip Filesize 1.3 GiB Identifier Watch2,6
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