world's most valuable company - was unveiled on this day 10 years ago.

The iPhone - the device that redefined the mobile phone and
made Apple the world's most valuable company - was unveiled
on this day 10 years ago.

More than one billion iPhones have been sold since Steve Jobs
took to a stage at Macworld in San Francisco promising "an
iPod, a phone and an internet communicator" - before revealing
one device that performed all three functions.

iPhone fever has sent Apple's value soaring to £515bn - despite
the first year of falling iPhone sales in 2016.

There have been 11 new versions of the phone since that
launch, with some controversial redesigns including different-
sized models, changes to screen sizes and disappearing
headphone jacks.

The device also led to the launch of the App Store in 2008 -
and the creation of a new digital industry, making fortunes for
the inventors of apps such as Angry Birds, Uber and
WhatsApp
.
Other innovations include the Siri voice-activated personal
assistant, the use of Touch ID and a powerful 64-bit processor.
The phone has been such a hit that the phone alone has
generated more cash than the product ranges of Microsoft and
Google.

The next version of the phone - expected to be unveiled in
September - has been rumoured to feature a larger screen that
covers most of the front of the device.

:: Life of the iPhone

:: 2007 - After being unveiled in January, the first iPhone goes
on sale in June in the US and November in Europe amid
passionate Apple fan reaction and queues outside retail stores.
Around 3.4 million units were sold that year.

:: 2008 - On July 11 2008 the second generation iPhone 3G
launches, including in a white colour option for the first time.
Apple is criticised for maintaining the high price of the device
compared with other mobile phones. The App Store is also
launched.

:: 2009 - The iPhone 3GS goes on sale in June, and sales for
the year reach more than 25 million.

:: 2010 - The introduction of the iPhone 4 includes the first
major redesign of the iPhone, as the front and back casing are
both made of glass for the first time, with a steel trim and
edges that serve as the antennas for signal reception.

However some users report holding the phone a certain way
affects their signal, forcing Apple to issue advice on how to
hold the phone to prevent phone calls dropping out. Sales rise
again to 47.5 million.

:: 2011 - The iPhone 4s is introduced, including voice assistant
Siri for the first time. Apple founder Steve Jobs dies the day
after the phone is announced, while the 4s then becomes the
first iPhone to sell one million units in its first 24 hours.

Also this year Apple surpasses long-standing market leader
Nokia as the largest mobile phone vendor in the world by
revenue.

:: 2012 - The iPhone 5 ushers in another redesign, this time
increasing the screen size to four inches for the first time. By
now, annual iPhone sales have hit 135.8 million units.

:: 2013 - Another "s" model, this time the iPhone 5s, is
launched. The first iPhone to include a fingerprint scanner
integrated into the home button, known as Touch ID.

:: 2014 - In September the iPhone 6 and 6 Plus are unveiled,
offering the iPhone in two sizes for the first time - both of which
have increased screen sizes on previous generations at 4.7 and
5.5 inches respectively. Sales response shatters all Apple
records, with four million sold in the first 24 hours and 10
million in the first three days of availability.

However the 6 and 6 Plus are not without flaws, as some users
report their devices bending when sat on or placed under
pressure.

:: 2015 - Thanks to the success of the 6 and 6 Plus, sales for
the year exceed 231 million units, while Apple also records the
largest single quarter profit of a private company during the
year.

In September the 6s and 6s Plus are released, complete with a
new pressure sensitive screen.

:: 2016 - As the smartphone market begins to reach saturation
point and competition from rivals increases, Apple reports
iPhone sales drops in each of the first three quarters of the
year.

This includes the first revenue drop for the company since the
iPhone first launched in 2007. However the one billionth iPhone
is sold during the year, and a new four-inch phone, the iPhone
SE is launched.

Then in September the iPhone 7 and 7 Plus are announced, with
the Plus housing a dual rear camera for the first time that is
designed to capture images to rival that of a digital camera.

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