watchOS 5.3 (16U5545c) for Apple Watch Series 4 (44mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date June 11, 2019 Upload Date June 6, 2019 Filename a9dc7f54104661d6a4deda931b0b36c2d303c39e.zip Filesize 1.3 GiB Identifier Watch4,2
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