tvOS 13.3.1 (17K5775c) 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 December 17, 2019 Upload Date December 13, 2019 Filename e0e2bd66ff35abe7f8759575f795e60a80faf7eb.zip Filesize 1.6 GiB Identifier AppleTV5,3
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