watchOS 4.3.1 (15T5555c) 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 May 1, 2018 Upload Date April 26, 2018 Filename ac049f8e5ee2cf060109520f087e071d552b0801.zip Filesize 1.1 GiB Identifier Watch2,7
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