This is not a simple “click restore” process. The iPhone 5s (A7) has strict signing restrictions, but a known OTA (over-the-air) signing loophole exists for 7.0.4 and 7.1.2 on certain global models. The iPhone 5s launched with iOS 7.0 in September 2013. It was the first 64-bit iPhone and the first with Touch ID. iOS 7 brought the flat, translucent “Jony Ive” design. Many enthusiasts consider iOS 7 on the 5s the fastest, most cohesive software-hardware pairing. Later iOS versions (9–12) slowed the A7 noticeably.