The new iPhone sports a diagonal 4-inch Multi-Touch display, an improvement over the previous iPhone's 3.5-inch display; those touch sensors are integrated directly into the display, reducing sunlight glare and keeping the iPhone's figure slim. Its 1136-by-640-pixel Retina display packs 326 pixels per inch into the space allotted. The display is made from optical-quality glass, which makes it highly scratch resistant. It also has an oil-resistant oleophobic coating that makes it easy to wipe off smudges.

Home Button

The only physical button on the face of the iPhone, the Home button provides a variety of shortcuts for accessing apps and iOS features.

Single-Press: A single-press of the Home button can have several results, depending on what you're using the iPhone for at the time: If the phone is in sleep mode, pressing the Home button wakes the iPhone; if you're in an app, it returns you to the home screen; if you're on a subsequent home screen page, it returns you to the first page; and if you're on the first home screen page, it brings you into the iPhone's Spotlight search mode.

Single-Press and Hold: If you press and hold the Home button for at least two seconds, that activates Siri.