watchOS 4.2.3 (15S600b) for Apple Watch Series 1 (42mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date February 19, 2018 Upload Date February 16, 2018 Filename 0f2539d2bcea93bb4428f084b270d310a662595b.zip Filesize 1.1 GiB Identifier Watch2,7
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