watchOS 5.1.3 (16S535) for Apple Watch Series 3 (38mm, LTE) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date January 22, 2019 Upload Date January 11, 2019 Filename 2b3eb924620a86654b5a75230aacd34a98a3729a.zip Filesize 1.3 GiB Identifier Watch3,1
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