iOS 9.3.1 (13E6238) for iPhone 4s ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date March 31, 2016 Upload Date March 30, 2016 Filename b8d38d1224b2e5763d00423e17837a8b4309b615.zip Filesize 1.1 GiB Identifier iPhone4,1
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