I jail broke my iPad and downloaded some softwares with cydia. But more and more problems are happening recentlyâ€”springboard crashing, unable to download apps on app store, slowdown of wifi, disability to make in-app purchases. So I thought this had to do with jail breaking. I decided to erase all the evidence by going to settings->general->reset->erase all content and settings (iTunes doesn't work on any of my PCs), but it needed a restriction code. I have no idea what that is, and I can't guess it right. So where do I get this code, or is there any better way to erase cydia?