watchOS 5.3 (16U5537b) for Apple Watch Series 4 (44mm, LTE) ✗ 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 May 28, 2019 Upload Date May 23, 2019 Filename 05688d48bc7215d3fdd0b3e692acfac5ca3c8a30.zip Filesize 1.3 GiB Identifier Watch4,4
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