This is by far the easiest method and does not require a computer. Connect your device to a stable Wi-Fi network. Navigate to > General > Software Update .
Use this path if you need to perform a factory reset or fix a corrupted operating system. Download iOS 15.7 for iPhone SE model iPhone8,4...
There are two distinct paths to get your phone running on the iOS 15 software branch: Method 1: The Over-the-Air (OTA) Route (Recommended) This is by far the easiest method and