watchOS 5.2.1 (16U5110a) for Apple Watch Series 4 (40mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date April 29, 2019 Upload Date April 26, 2019 Filename 1d1d22a72bf770b38a9d138dcfd5edc78af267c5.zip Filesize 1.3 GiB Identifier Watch4,1
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