watchOS 5.3.7 (16U674) for Apple Watch Series 4 (40mm, LTE) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date May 18, 2020 Upload Date May 8, 2020 Filename 25e48dcb951e514ddeae61e58a733cffa7017a5b.zip Filesize 1.4 GiB Identifier Watch4,3
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