tvOS 11.3 (15L6211) 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 29, 2018 Upload Date March 19, 2018 Filename d5b50c34ff3f142d3d33e5600cd037d7b0919bdc.zip Filesize 1.2 GiB Identifier AppleTV5,3
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