iOS 9.9.11.2.1 (15C6153) for iPhone 5s (GSM) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date December 13, 2017 Upload Date December 11, 2017 Filename 10568900e3dcbe735e02a0d017f5d85f6d06ae78.zip Filesize 1.7 GiB Identifier iPhone6,1
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