I decided to change my iPhone password from numerical to text-based... which, disastrously, has resulted in me forgetting said password. This shouldn't be much of an issue in theory, but I'm greeted with a lovely error message every time I try to restore the iPhone. After clicking "restore," iTunes takes around a minute before I receive a message indicating the following: "The iPhone "iPhone" could not be restored. This device isn't eligible for the requested build." So, how can I restore my iPhone despite this message popping up after every attempt?