iOS 9.1 (13B5130b) for iPhone 4s ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
potential future use. They might also be useful if you're doing research.
Release Date October 4, 2015 Upload Date September 29, 2015 Filename dfd8a71c95acad9818d084a79c229e11630d51ec.zip Filesize 1.1 GiB Identifier iPhone4,1
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