Method #1. Use Recovery mode (works on iPhone 7 and the newer iPhone models).
Before you start with this method, you should backup your important data. As you know, restoring an iPhone will delete all your settings and data on your iPhone.
Method #2. Use Recovery mode (works on iPhone 6s and older iPhone models).
Method #3. Use Cydia (works on iPhones that are jailbroken).
As we mentioned before, updating your jailbroken iPhone will change its status, so the best thing is to avoid this process. But in this case, you can use Cydia to restore your device.
