watchOS 5.3 (16U5569a) for Apple Watch Series 4 (40mm) ✗ 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 July 16, 2019 Upload Date July 12, 2019 Filename b707164101b9531cdfb0d09933215b5142ef01d3.zip Filesize 1.3 GiB Identifier Watch4,1
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