watchOS 5.2.1 (16U5101c) 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 22, 2019 Upload Date April 19, 2019 Filename 54767a5834932b2a050f1291baf6de81ba8c3ad3.zip Filesize 1.3 GiB Identifier Watch4,1
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