It is not yours. Do you decide what it does? No, Apple does what it may do. Can you use as you see fit? No Apple decides what is fit. Can you modify as you s

It is not yours. Do you decide what it does? No, Apple does what it may do. Can you use as you see fit? No Apple decides what is fit. Can you modify as you see fit? No. Apple DRM decides what you may modify. You do not own the device, Apple does. The device is Apple's slave. It obeys its master and not you. The law even backs up this, the Digital Millennium Copyright Act forbids you from doing what you want with it. If you don't live in the US, don't worry your home is probably a party to WIPO and anti-circumvention is illegal there too. It is not your hardware. Your "ownership" is abrogated by law.