watchOS 4.3.1 (15T5567a) for Apple Watch Series 1 (38mm) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date May 14, 2018 Upload Date May 11, 2018 Filename d5817181b993fb2181ebc80f5cc4f091e0ea845d.zip Filesize 1.1 GiB Identifier Watch2,6
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