The iPhone 4 is the thinnest smartphone ever – 9.3 mm – with an all-new design and build quality like no other mobile device. The front and back are made of aluminosilcate glass, chemically strengthened to be 30 times harder than plastic, more scratch resistant and more durable than ever. The front and back glass cover have an oil-resistant coating that helps keep it clean, and encircling iPhone 4 is a highly finished stainless steel band made of a custom alloy that is forged to be five times stronger than standard steel. The new iPhone 4 features FaceTime, which makes the dream of video calling a reality, and Apple’s stunning new Retina display.