Download iOS 12.4.3 Build 16G130 IPSW Firmware Restore Files
Download the IPSW iOS 12.4.3 (Build 16G130) firmware file released at 28 October 2019 intended to restore iPhone 5s (GSM) via iTunes. IPSW iOS 12.4.3 build 16G130 is unsigned by Apple to update Apple device software.
