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.
Double-Press: When the phone is locked or in sleep mode, a double-press of the Home button wakes your device and brings up both the iPod controls and a shortcut for the Camera app. In active use, it brings up the multitasking bar, showcasing your active apps.
F) Headphone Jack
The new iPhone has a standard 3.5mm audio jack, located on the bottom of the device. Apple includes a set of white EarPods that allow you to listen to audio and speak on a call, but you can also use any pair of third-party headphones instead.
One of the iPhone 5's three microphones is located on the bottom left of the device. (The other two, which are designed to filter out noise, are located on the front and back.) Unless you're using an external microphone, you'll speak into these when making calls, recording voice memos, talking to Siri, and more.
H) Dock Connector
The iPhone uses Apple's new Lightning dock connector to connect to your computer and other accessories. Unlike the 30-pin connector, it's reversible, so you can plug it into your phone in either direction. As this is one of the first Apple devices to use a new connector, it won't work with older third-party accessories without an adapter.