Apple unveiled its new iPhone 5S in a special event on 10 September. Here, we bring you everything you need to know about the iPhone 5S availability, UK pricing, best network tariffs, specifications, photos and information about new features in the iPhone 5S.

We've been talking about it for months now, but Apple has finally taken the wraps off the iPhone 5S. As expected, it now comes in three colours, has a built-in fingerprint sensor, and also sports a 64-bit A7 processor.

How to buy the iPhone 5s

The iPhone 5S was released on Friday 20 September. Stores opened at 8am, but it wasn't long before Apple Stores across the country had sold out of the new flagship phone, as thousands of customers flocked to each store. See: iPhone 5s runs out: how to get an iPhone 5s without spending £2,050

Apple on Monday announced that it sold 9 million iPhone 5s and iPhone 5c units during the first three days, which is a record-breaking figure for the company. However, Apple also admited that "demand for iPhone 5s has exceeded the initial supply," adding that it appreciates everyone's patience and is "working hard to build enough new iPhones for everyone."

There were reports that Apple's flagship stores would be receiving delivery of iPhone 5s units on Monday, but it seems that hopeful customers were out of luck as the Apple Store in Regent Street apparently didn't get any iPhone 5s units but is expecting them to arrive in the week.

Those who haven't already ordered their iPhone 5s online from Apple will have a long wait ahead of them. Apple is now saying that the iPhone 5s will be dispatched in October, but doesn't specify a date.

See: Inside the iPhone 5s

Carriers are also running low on iPhone 5s stock. Most of O2's iPhone 5s models now say "delivery in 3-6 weeks,"

Three's Space Grey and Silver versions of the iPhone 5s now have an estimated delivery of 8 October, while the Gold models aren't expected to ship until mid-October.

See: How to set up a new iPhone 5c or iPhone 5s

All three colours of the iPhone 5s are available to order from Carphone Warehouse, but they all say "Pre-order" and are expected to be delivered by 30 September.

As for Phones 4 u, it looks like most models are available to order for expected delivery of end of September/early October. Some of the smaller capacity Space Grey and Silver models are in stock and are eligible for free next day delivery.

EE's iPhone 5s models are available to order in any colour, but advise that customers should allow 28 days for delivery.

We couldn't seem to find out Vodafone's shipping estimates, but we'll update this article as soon as we know.

Tesco Mobile's 5s page still says "coming soon."

See also: How to downgrade from iOS 7 to iOS 6

New iPhone 5S UK price

The 16GB model of the iPhone 5S will set you back £549 from the UK Apple Store.

For the 32GB model, it'll cost £629, and for the 64GB model, £709.

That's up from the iPhone 5's previous price of £529, £599 and £699 for the same capactities.

New iPhone 5S UK contract prices

We're gathering all the UK mobile network prices for Apple's new phones here: 

iPhone 5s tariffs

iPhone 5c tariffs 

New iPhone 5S specifications

The iPhone 5S has a new A7 processor. This means that the iPhone 5S is the first ever 64-bit iPhone, and is up to two times as fast as the iPhone 5. The CPU performance from the first iPhone to iPhone 5S has increased by 40 times, says Apple.

The A7 is a 64-bit desktop class architecture, with a modern ARM instruction set that's more efficient, 2x general-purpose registers, 2x floating-point registers, over 1 billion transistors and in the same die size as the A6.

See: Cambridge-based ARM set to cash in on Apple iPhone 5s

In addition to the A7 chip, the iPhone 5S has a brand new part called M7. It's a Motion coprocessor, which takes advantage of all of the sensors and continuously measures the data coming from the accelerometer, gyroscope and compass without having to wake up the A7.

To find out how the iPhone 5s compares to the competition read: How does the iPhone 5s compare to Samsung and other smartphones

See: The M7 motion coprocessor in the iPhone 5s is a big deal

Read our iPhone 5S review and our iPhone 5c vs iPhone 5S article. 

[More iPhone reviews]

New iPhone 5S fingerprint sensor: Touch ID

As expected, Apple has built a fingerprint sensor into the iPhone 5S's Home button. The fingerprint sensor aims to eliminate the need for a passcode.

See: Inside the iPhone 5s Touch ID scanner

The iPhone 5S fingerprint sensor is called a Touch ID capactive sensor, and is just 170 microns thin. It has a 500 ppi resolution, and scans sub-epidermal skin layers for a better image. You can teach it about one finger and, no matter what orientation, it can tell.

The Home button still has a tactile switch, but also has the Touch ID sensor, with an encircling stainless steel detection ring, and topped with laser-cut sapphire lens.

See: Apple's iPhone 5s reopens debate on sensor data collection

iPhone 5s vs competition: 8 features Apple's new iPhone 5s doesn't have

Hackers bypass iPhone 5s Touch ID fingerprint sensor using "easy everyday means"

New iPhone 5S battery life

The iPhone 5S has equal or greater battery life than the iPhone 5. Apple claims that the iPhone 5S is 10 hours of 3G talk time, 10 hours of LTE browsing, 10 hours of WiFi browsing, up to 250 hours of standby.

New iPhone 5S camera

Apple's iPhone 5S has a new five-element Apple designed lens with a larger f/2.2 aperture. The camera's new sensor has a 15 per cent larger active area, and the pixels on this sensor are 1.5 microns in size, larger than the iPhone 5 and larger than other smartphones. 

In addition to the hardware, Apple has also designed iOS 7 to take advantage of the new camera and the A7 chip's imaging capabilities. Before you take a picture, the iPhone 5S will perform auto white balance and auto exposure, and will create a dynamic local tone map around the image to get better highlights and shadows. The camera actually takes multiple images and analyses them in real time to see which is the sharpest.

As rumoured, the iPhone 5S also has a dual-LED flash, which Apple calls the True Tone Flash. This new flash features one cool LED and one warmer one, which aims to give you the right colour flash for the situation you're in.

Apple didn't stop there. The iPhone 5S also has auto image stabalisation, which aims to give users a much sharper image. There's also a new Burst mode, which will take photographs at 10 frames per second until you let go of the shutter.

Additionally, there's a new slo-mo mode, which lets you create scenes with slow motion.

For a closer look at Apple's new iPhone 5s camera, visit iPhone 5s new camera features.

Thinking of buying an iPhone 5s or iPhone 5c on Friday? Our latest issue of iPad & iPhone User answers all your questions about Apple's new phones including UK pricing. 

Just £2.49 on Apple's Newsstand, get your copy here

See also:

iPhone 5s: Reactions and first look reviews from around the web

When will Apple update its software?

iPhone 5s: Is Apple innovating or playing catch-up?

Apple unveils new docks for the iPhone 5s and iPhone 5c

iPhone unveiling prompts recycling rethink

Apple's new iPhone moves impact more than just consumer tech

Cook: More than 700 million iOS devices sold