I own the older iPhone 3Gs and my friend has the more-recent iPhone 4. Both have Google Maps pre-installed and its great. However, I went ga-ga over the 3D feature of the Apple Maps included on the iPhone 5. I was assured at the Apple Store that the Apple Maps can be downloaded into any older iPhone, but when I search for "Apple Maps", I see nothing? How can I download Apple Maps or must I purchase the iPhone 5? There must be another way.