Download iOS 9.3.1 Build 13E238 IPSW Firmware Restore Files
Download the IPSW iOS 9.3.1 (Build 13E238) firmware file released at 31 March 2016 intended to restore iPhone 5 (GSM) via iTunes. IPSW iOS 9.3.1 build 13E238 is unsigned by Apple to update Apple device software.