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Anatomy of the iPhone 4S Hardware

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iPhone 4S Hardware Features
iPhone 4S

iPhone 4S

image copyright Apple Inc.

If you know the iPhone 4, you basically know the iPhone 4S. With the exception of the redesigned antenna, the buttons, ports, switches, and sensors on the iPhone 4 and 4S are basically identical. If the iPhone 4S is your first iPhone, though, here's an explanation of what everything is and does to 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 Sounds setting, too).
  2. Antennas - These four thin black lines, one at each corner of the phone, are the two iPhone 4S's antennas. This is redesigned from the AT&T iPhone 4, which had antennas at the bottom corners and along the top. These four antennas are part of an dual-antenna set-up that allows both to operate independently to increase call quality.
  3. Front Camera - This camera, placed next to the speaker, takes VGA-quality photos and shoots video at 30 frames per second.
  4. Speaker - The speaker at which you hold the phone to your ear to listen to calls.
  5. Headphone Jack - Plug your headphones, and some accessories, into the headphone jack at the top left corner of the iPhone 4S.
  6. Hold 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.
  7. 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 takes photos, too.
  8. 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 multitasking.
  9. Dock Connector - This port on the bottom of the iPhone is used when syncing and connecting the phone to some accessories.
  10. 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 on calls or when using Siri. The one to the right is a speaker that plays audio from apps and the speakerphone feature of the Phone app.
  11. SIM Card - The iPhone 4S's SIM card is held in a slot on the phone's right side. Learn more about the iPhone SIM card here.
  12. Back Camera (not pictured) - 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.
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