The iPhone is a smartphone designed and marketed by Apple Inc. Steve Jobs unveiled the first iPhone in 2007. Key features of iPhone models include a touchscreen display, camera, speakers, Apple's iOS operating system, and access to the App Store. Jailbreaking iPhones allows users to customize the device beyond Apple's limitations but may void the warranty. The iPhone is hugely popular and profitable, making Apple the most valuable company in the world.

1. iPhone
Designed and marketed by :
Apple Inc.

2. History and Availability
• Development of the iPhone began in 2005
with Apple CEO Steve Jobs' direction that
Apple engineers investigate touchscreens.
• Jobs unveiled the iPhone to the public on
January 9, 2007 at the Macworld 2007
convention at the Moscone Center in San
Francisco.

3. Hardware
• The touchscreen on all models is a 9 cm
(3.5 in) liquid crystal display with scratch-
resistant glass.
• The capacitive touchscreen is designed for a
bare finger, or multiple fingers for multi-
touch sensing.

4. Audio and Output
• One of two speakers (left) and the
microphone (right) surround the dock
connector on the base of the original iPhone.
If a headset is plugged in, sound is played
through it instead.
• On the bottom of the iPhone there is a
speaker to the left of the dock connector and
a microphone to the right.

5. Liquid Contact Indicators
• The iPhone is equipped with liquid contact
indicators which change from white to red in
color when they come in contact with water.
These suggest whether water damage has
affected the device or not.

6. List Of Models
• iPhone
• iPhone 3G
• iPhone 3GS
• iPhone 4
• iPhone 4S

7. iPhone 4S
The dual-core A5 chip delivers even more power. The 8MP camera with all-new
optics also shoots 1080p HD video. Talk about amazing.

8. Dual-core A5 chip.
The most powerful iPhone processor ever.
Two cores in the A5 chip deliver up to two times more power and up to
seven times faster graphics. And you’ll feel the effects. Fast. iPhone 4S is
quick and responsive, which makes all the difference when you’re
launching apps, browsing the web, gaming and doing just about
everything.

9. The you-can’t-believe-it’s-on-a-phone camera.
This just might be the best camera ever on a phone. And with all-
new optics, it just might be the only camera you need.
The iPhone 4S camera gives you 8 megapixels — that’s 60 per cent more
pixels than the camera on iPhone 4. And they’re engineered with a higher,
full-well capacity to collect even more light.

10. Video recording. In 1080p amazing HD.
Shoot stunning 1080p HD video everywhere you go. With all-new optics,
the light is always right, the colour is always vivid and everything will look
even better than you remember.
Record amazing 1080p HD video at 30 frames per second. The advanced
backside illumination sensor and larger aperture let in even more light.

11. iOS. The world’s most advanced mobile
operating system. And the easiest to use.
With every iOS advancement comes even easier ways to do everything. That’s
what makes iOS years ahead of anything else. Here are just a few
of the favourites.
Notification Centre Newsstand PC Free

12. iCloud. Your content. On all your devices.
iCloud is the easiest way to manage all your stuff, because
it manages it all for you. iCloud stores your photos, apps,
mail, contacts, calendars, documents and more.

13. Retina display.
Clearly remarkable.
The sharpest, most vibrant thing
you’ll see on iPhone 4S is everything.
The Retina display is the highest-
resolution phone screen ever.
But without a doubt, you’ll notice
crisp text, sharp graphics and
stunning images. It’s more
remarkable than the printed page.
And you’ll be completely absorbed.

14. App Store. Over 500,000 apps for
work, play and everything in between.
The apps that come with your iPhone are just the
beginning. Browse the App Store to find hundreds of
thousands more in just about any category — many
of them are free.

15. Call it better, faster and
even more worldly.
iPhone 4S is the first phone
to intelligently switch between
two antennas to transmit and receive,
so call quality is better. It also doubles
the maximum HSDPA data speeds to
14.4 Mbps. Which means faster
connections, faster loading and
reloading, and faster downloads.
Maximum Data Download Speeds
(HSDPA)
iPhone 4S 14.4 Mbps
iPhone 4 7.2 Mbps

16. iOS Jailbreaking
• iOS jailbreaking, or simply jailbreaking, is the process
of removing the limitations imposed by Apple on
devices running the iOS operating system through
use of custom kernels.
• Jailbreaking allows users to gain root access to the
operating system, allowing iOS users to download
additional applications, extensions, and themes that
are unavailable through the official Apple App Store.

17. • A tethered jailbreak requires that the device be
connected to a computer each time it needs to
be booted; an untethered jailbreak allows the
device to be powered without computer
assistance.
• Under the Digital Millennium Copyright Act,
jailbreaking iPhones is legal in the United States,
although Apple has announced that the practice
"can violate the warranty".

18. Reasons for Jailbreaking
• One of the main reasons for jailbreaking is to expand
the feature set limited by Apple and its App Store.
• Since software programs available through Cydia are
not required to adhere to App Store guidelines, many
of them are not typical self-contained apps but
instead are extensions and customizations for iOS
and other apps.

19. Records & Sales
The most valuable
company of the
United States and
world.

20. R.I.P.

21. “If you don’t have an
iPhone,
well you don’t have an
iPhone.”