Restore device with iOS 4.0
I’ve an iPhone 4 and I would restore it with his original iOS (iOS 4.0). Also if I reset iPhone, it goes back with iOS 7.1.2 and I wont it (also because it’s slow on an iPhone 4). So, I ask if is possible restore this device with his original iOS (iOS 4.0). How can I do?
Thank you in advance for reply.
Is this a good question?