watchOS 5.3.5 (16U652) 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 February 18, 2020 Upload Date February 11, 2020 Filename d0b32a62c74d169cd5b8f3c9415e28e1170a7f32.zip Filesize 1.4 GiB Identifier Watch4,3
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