tvOS 11.3 (15L5175d) for Apple TV 4 (2015) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date February 7, 2018 Upload Date February 1, 2018 Filename 3265c741ee0a29a8faa0ad7494846531c7471f20.zip Filesize 1.2 GiB Identifier AppleTV5,3
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