Anatomy of the iPhone 4S Hardware, Ports, and Buttons

iPhone 4S hardware

iPhone 4S Ports, Buttons, Switches and Other Hardware Features

If you know the iPhone 4, you may think you know the iPhone 4S. After all, they do look a lot alike. They have basically the same body and similar ports. They're not identical, though. [Ed note: The iPhone 4S has been discontinued. Here's a list of all the iPhones including the most current.]

Whether the iPhone 4S is your first iPhone or if you're upgrading from an earlier model, here's an explanation of what every button, port, and switch is and does.

This should help you get oriented to your new phone.

  1. Ringer/Mute Switch—This small toggle switch on the left-hand side of the iPhone 4S lets you easily mute the iPhone 4S's ringer simply by flipping the switch down (muting the ringer can be done in the Settings app, under Sounds, too). RELATED: How to Turn the iPhone Ringer Off
  2. Antennas—These four thin black lines, one at each corner of the phone, are the iPhone 4S's two antennas. The placement of the antennas is redesigned compared to the AT&T iPhone 4, which had antennas at the bottom corners and along the top. These antennas are part of a dual-antenna setup that allows both to operate independently to increase call quality. RELATED: The iPhone 4 Antenna Problems Explained - and Fixed
  3. Front Camera—This camera, placed next to the speaker, takes VGA-quality photos and shoots video at 30 frames per second. Without it, you couldn't take selfies or use FaceTime. RELATED: Why Is Facetime Not Working When I Make Calls?
  1. Speaker—The speaker at which you hold the phone to your ear to listen to calls.
  2. Headphone Jack—Plug your headphones, and some accessories, into the headphone jack at the top left corner of the iPhone 4S.
  3. On/Off/Sleep/Wake Button—This button, at the top right corner of the phone, locks the iPhone and turns the screen off. It's also used in restarting the iPhone, turning it off, and putting it into recovery and DFU modes.
  1. Volume Buttons—These buttons on the left side of the iPhone let you turn the phone's volume up and down (this can be done in software, too). When the iPhone is locked and the home button is double-clicked to activate the Camera app, the volume up button snaps photos, too.
  2. Home Button—This button on the front center of the phone's face does a number of things: it completes app re-arrangement, and is involved in restarting the phone and using multitaskingRELATED: The Many Uses of the iPhone Home Button 
  3. Dock Connector—This 30-pin port on the bottom of the iPhone is used for syncing the phone with a computer and to connect the phone to some accessories. This is not the same port as the 9-pin Lightning connector introduced on the iPhone 5. 
  4. Speaker & Microphone—There are two grills on the bottom of the iPhone, one on either side of the Dock Connector. The grill to the left of it is the microphone that picks up your voice for calls or when using Siri. The one to the right is a speaker that plays audio from apps, the ringer when calls are coming in, and the speakerphone feature of the Phone app.
  5. SIM Card—The iPhone 4S's SIM card is held in a slot on the phone's right side. The SIM Card is what's used to connect your phone to cellular phone and data networks. Learn more about the iPhone SIM card here.

    iPhone 4S Hardware Not Pictured

    1. Apple A5 Processor—The iPhone 4S is built around Apple's snappy A5 processor. It's a slight upgrade over the A4 at the heart of the iPhone 4.
    2. Back Camera—Not shown here is the iPhone 4S's camera, which is at the top left corner of the phone's back. This is the phone's 8-megapixel camera, which can also shoot 1080p HD video. RELATED: How to Use the iPhone Camera