watchOS 5.3 (16U5558b) 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 June 24, 2019 Upload Date June 20, 2019 Filename 619dd8fb28f75ee8d311ef7c827cbb760b48c13e.zip Filesize 1.3 GiB Identifier Watch4,1
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