tvOS 11.3 (15L5198d) 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 March 5, 2018 Upload Date March 1, 2018 Filename 3b50dc2264cb3853925c827ccaf1a6bb2778ea64.zip Filesize 1.2 GiB Identifier AppleTV5,3
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