For example, you cannot get on the iPhone 13 without a baseband firmware update that enables the feature. Apple controls this rollout via carrier bundles and modem firmware. Conclusion The firmware inside the iPhone 13 is a fortress. It represents the culmination of Apple’s 15-year war against unauthorized access. From the unbreakable Boot ROM to the isolated Secure Enclave, the code running beneath iOS is arguably more impressive than the operating system itself.
For the security researcher, the iPhone 13’s firmware is the Mount Everest of hacking—a silent, black slab of silicon that, so far, refuses to be conquered. Firmware APPLE iPhone 13
If iOS is the soul of the iPhone, firmware is the spinal cord. For the iPhone 13, this firmware is a marvel of reverse-engineering resilience, security, and low-level control. For example, you cannot get on the iPhone
It is not iOS. You cannot delete it, and you rarely update it manually. It is the first code that runs when you press the power button—before the Apple logo even appears. It represents the culmination of Apple’s 15-year war