The birth of Apple's superphone
Update: Nine years ago the original iPhone was finally released in stores around the US. To celebrate, we've collected together every iPhone that has ever been released.
It was January 9 2007 when Steve Jobs took to the stage of the Moscone Center in San Francisco to announce the arrival of the iPhone, which went on sale worldwide later that year.
If you find it difficult to remember that far back, Leona Lewis was number one in the UK with A Moment Like This and people were flocking to the cinema to get teary-eyed at Will Smith in The Pursuit Of Happyness.
While our pop music and movie choices may not have improved much, smartphones were changed forever: from that point on, touchscreens, apps and digital media were the way forward.
iPhone 1 (first generation)
Launched: June 2007 (US), November 2007 (UK)
Steve Jobs introduced the iPhone as three devices in one: a touchscreen iPod, a revolutionary mobile phone, and a truly mobile web browser.
Now we take touchscreens, digital media playback and web access for granted, but in 2007 the iPhone was unlike anything that had appeared before. Its 3.5-inch screen had a 320 x 480 pixel reoslution (one of the best displays of the time), with a 2MP camera built in, and up to 8GB of storage.
Third-party apps were not yet allowed on "iPhone OS". In the TechRadar review, we noted that despite several shortcomings, the phone had "changed the mobile device landscape… multitouch will prove to be a model for interfaces in the future".
iPhone 3G (second generation)
Launched: July 2008
High-speed connectivity was big news in 2008, which is why the second generation iPhone included 3G in its moniker (rather confusingly, as this was the second generation iPhone). It also brought with it a thinner shape, a plastic back and – crucially – support for the newly launched App Store.
The app store model worked so well you'll now find it replicated in everything from your smart TV to your Windows 8 laptop, and the change helped Apple's phone really start to gain traction.
We said in our iPhone 3G review that buyers would be "amazed by the function and feel of this handset". The iPhone era had begun in earnest.
iPhone 3GS (third generation)
Launched: June 2009
The iPhone 3GS upgrade was viewed as disappointingly minor at the time, but look at the detail and a different picture emerges: as well as faster performance, the new handset offered a better 3.2MP camera (that could now record video as well as take photos), extra storage options and voice control (the precursor to Siri).
The display was the same 3.5-inch 320 x 480 screen, and the device's appearance remained largely unchanged from the 3G model. TechRadar's take on the unit praised the multimedia and internet capabilities, while still finding niggles with the camera, call quality and battery life – this was the first of the more iterative updates to the iPhone, but did enough to keep users happy.
iPhone 4 (fourth generation)
Launched: June 2010
If the 3GS was a minor upgrade, the iPhone 4 was a serious step up – a new, flat design with an integrated antenna (although questions were raised about how you held the device), a high-resolution Retina display (640 x 960 pixels) that showed the rest of the world how it was done and a superior 5MP camera (featuring HD video recording), on top of internal performance improvements.
The competition was catching up, and Apple had responded in brilliant fashion. We were certainly impressed, despite some reservations about the high price, saying "It's intriguing to see record-breaking numbers queuing up to pick up this device – but after playing with it for a few days, you can see why."
iPhone 4S (fifth generation)
Launched: October 2011
Apple pulled out the "S" tag again for the fifth generation handset, indicating a minor upgrade rather than a major overhaul.
The design of the iPhone 4S was the same, but inside was Apple's new A5 processor, vastly improved graphics capabilities and an 8MP camera with 1080p video recording. iOS was evolving at the same rate as the hardware, of course, and Siri began life as an iPhone 4S exclusive.
The improvements were enough to persuade us to describe it as "the best thing Apple has ever created" in the official TechRadar review.
iPhone 5 (sixth generation)
Launched: September 2012
After six handsets, Apple finally decided it was time to tweak the iPhone's screen size and aspect ratio.
Coming in at 20% lighter than its predecessor, the 2012 iPhone adopted a 4-inch screen, running at 640 x 1136 pixels.
Otherwise, despite the usual speed bump and a stronger antenna, it was very much business as usual in terms of the design and capabilities.
Our biggest gripe in our iPhone 5 review was with the aging iOS, but with iOS 7 arriving on September 18 that issue is very much negated, which will please a number of iPhone 5 users who've been holding onto the handset for nearly a year.
iPhone 5S/5C (seventh generation)
Launched: September 2013
The big step in the seventh stage of the iPhone's evolution was the arrival of the iPhone 5C, a slightly cheaper, plastic-backed model to help battle Android in the busy mobile middle market. The signs were there already – remember Apple kept the iPhone 4 and 4S on sale during the iPhone 5 era.
Apart from the plastic shell and larger battery, though, the iPhone 5C was, in terms of specs, a carbon copy of the iPhone 5 – which was retired to make way for the two new handsets.
As for the flagship iPhone 5S, it was a case of under-the-hood improvements again: more power, a better camera, and a fancy fingerprint reader hidden under the home button. The bigger changes arrived with iOS 7, the most radical revamp of the mobile operating system since the App Store arrived back in 2008.
iPhone 6/6 Plus (eighth generation)
Launched: September 2014
After the smaller changes that came with the iPhone 5C and iPhone 5S, Apple was back to its revolutionary best with the following generation, as the iPhone 6 and iPhone 6 Plus brought the biggest alterations in design and features since the leap from the iPhone 4S to the iPhone 5.
The most striking change the eighth generation iPhones ushered in was undoubtedly the screen size, with the iPhone 6's display leaping from the iPhone 5's 4 inches to 4.7 inches. Apple also upped the resolution from the 1136 x 640 of previous iPhones to 1334 x 750. This meant that the larger screen still had a high pixel density of 326ppi (pixels per inch), so image quality was incredibly sharp and detailed.
As the name suggests, the iPhone 6 Plus went even larger, with a whopping 5.5-inch display, marking Apple's first foray into the phablet market. The iPhone 6 Plus also got a resolution boost to full high definition, 1920 x 1080. With a pixel density of 401ppi, not only does the iPhone 6 Plus have the largest screen of any iPhone ever, but it also has the clearest.
The iPhone 6 and iPhone 6 Plus also benefit from Apple's use of "dual-domain pixels", which along with the 1300:1 contrast ratio makes the screen on the handsets look absolutely fantastic.
Both the iPhone 6 and the iPhone 6 Plus also ditched the industrial and sharp-edged design that had been with the iPhone for four generations, in favour of a more ergonomically-pleasing chassis with a screen that curves into a body with rounded edges and corners.
Both handsets feature metal backs, and as we pointed out in our reviews, they take a lot of design language from the iPad Air, resulting in a product that looks and feels genuinely premium.
Another big change is that the boosted screen sizes and the corresponding increase in body dimensions have meant that the power button now resides on the right-hand side of the devices.
Along with the launch of the iPhone 6 and iPhone 6 Plus Apple, released iOS 8, which kept many of the flat aesthetics of iOS 7 and ushered in some neat new features.
It wasn't a completely smooth launch, however, and after only a few months Apple has already patched it to iOS 8.1.3 in a bid to squash bugs and fix problems.
The rocky launch of iOS 8 was in stark contrast to the assured releases of the iPhone 6 and iPhone 6 Plus, with Apple proudly announcing that the two iPhones broke the company's records for pre-orders in the first night they were available.
iPhone 6S/6S Plus (ninth generation)
Launched: September 2015
Say hello to the iPhone 6S and iPhone 6S Plus. So what can you expect from Apple's ninth generation smartphone? As the names suggest the 6S and 6S Plus don't exactly ring the changes. Rather they build on the solid base provided by the 6 and 6 Plus from 2014.
The keep the same 4.7-inch and 5.5-inch displays, with the same resolutions, and there's nothing new in the design department with Apple sticking with the well received look of its eighth generation devices. There is however a new color, with rose gold joining silver, gold and space grey. Lovely.
Both still sport all metal bodies, but they're now formed from 7000 series aluminum, which Apple says is super tough.
There is a new power unit under the hood, with Apple's new A9 chip boosting performance, while the rear facing camera is now an impressive 12MP offering with a new Live Photo feature which can capture a few seconds of video with each snap.
The big talking point here though is Apple's new 3D Touch technology. This allows the display on the iPhone 6S and 6S Plus to monitor how much pressure you're applying to it.
With the ability to measure the force of your finger, the new iPhones can provide additional functionality. Peek at content without the screen it's embedded in by lightly pressing on it, and press firmly to open it in a separate window.
iPhone SE (tenth generation)
Launched: March 2016
The latest release from Apple is the iPhone SE, which takes a lot of features from the iPhone 5S and brought them into a phone ready to face the market of 2016.
It's the perfect choice for you if you're looking for a smaller iPhone as it comes with a 4-inch screen. The body looks much like the iPhone 5S and while the design may seem a little tired, it still feels premium to the touch.
Plus the iPhone SE comes with a 12MP rear-facing camera, a 64GB storage option and iOS 9 software.
The screen technology on the iPhone SE is a little out of date but the iPhone SE is the cheapest Apple phone you can buy right now and it offers up a better battery life than any other iPhone you can buy today.
Expect us to update this list in the coming months as we expect to see a brand new iPhone coming in September 2016.
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