Custom firmware (CFW) for the is a specialized topic because this device occupies a unique spot in iOS history. As the first iPhone with the A5 chip, it was long considered "un-hackable" for certain types of deep customization, but modern tools have changed that. Why Use Custom Firmware on an The primary reason users seek custom firmware for the downgrading . While the
supports up to iOS 9.3.6, that version is notoriously slow on its hardware. Custom firmware allows users to: Restore Performance iphone 4s custom firmware
Download a signed (or previously signed) IPSW for iPhone 4s, e.g.: Custom firmware (CFW) for the is a specialized