KOREAN PHONE MAKER Samsung announced its Galaxy S4 smartphone at a bizarre press event in New York on 14 March, wooing the crowd at Radio City Music Hall with its hardware upgrades and innovative software features.

Since, it has made its debut in the UK and other countries, and Samsung announced in May that it has already flown past 10 million sales. If analyst predictions are anything to go by, this number may increase to 80 million before 2013 is up.

Because of these bumper sales, Samsung has since announced a handful of new Galaxy S4 models, which will be available in red, brown and purple.

Of course, these incoming model will feature the same specs as the original Galaxy S4, including a 5in touchscreen, nippy quad-core processor and 13MP rear-facing camera.

However, it's on the software side where things get really interesting, with Samsung equipping the phone with several features including Group Play and Smart Scroll, a quirky eye-scrolling feature that enables users to control webpages simply by moving their eyes. The Samsung Galaxy S4 also echoes Sony's Xperia lineup with its 'floating touch' display, which means users can operate the screen without touching it. 

Not only has Samsung announced new colour versions, it has also announced the pint-sized Samsung Galaxy S4 Mini and the rugged Samsung Galaxy S4 Active.

To see where you can pick up your Galaxy S4, check out our full roundup of where you can buy the it, and how much you can expect to pay.

Samsung Store, Stratford WestfieldSamsung has told us that the Galaxy S4 will go on sale at its flagship store in London's Stratford Westfield mall on Saturday 27 April, where it will be available to buy SIM free.

O2
Following Samsung's announcement, O2 promptly tweeted that it will be offering the Samsung Galaxy S4. Since, it has started selling the phone, with the cheapest tariff coming in at £37 a month. This will get buyers a free Samsung Galaxy S4, 600 minutes, unlimited texts and 750MB data.

EE
EE is feeling pretty smug, as it will be the only UK mobile operator to offer the handset with 4G from launch. The network's pricing is typically expensive. For example, a 24 month £31 tariff, which comes with just 500MB data, also comes with an upfront cost of £79.99 for the phone. The best 'deal' we found was a 24 month £46 contract which comes with an upfront cost of £29.99, along with unlimited minutes, unlimited texts and 3GB of monthly data.

ThreeThree started taking orders for the Samsung Galaxy S4 ahead of the phone's release on 27 April, and it's pricing is typically appealing. and is Pricing starts at £35 a month on a two-year-long contract, with Three's One Plan, which comes with unlimited data, 5,000 texts and 2,000 minutes, priced at £37 a month.

What's more, the Samsung Galaxy S4 will also support Three's 'ultra-fast' DC-HSDPA network, which we've found can reach speeds similar to those obtained on EE's 4G LTE network.

VodafoneUK operator Vodafone might not offer 4G services yet, but the network tells us that it will offer a 4G ready version of the Galaxy S4. Pricing for the 4G ready model on Vodafone starts from £37 a month, a deal which comes with unlimited minutes and unlimited texts, and 2GB of monthly data. This can be upped to 4GB data each month, but buyers will have to sign up to a £47 contract. Vodafone also, will start shipping out orders on 27 April.

Virgin Media
Although it doesn't always offer the big-name smartphones, Virgin Media has started taking orders for the Samsung Galaxy S4. Prices start from £99 on a £36 24 month contract, although current Virgin Media customers will be able to bag a £5 a month discount. 

Tesco Mobile
Supermarket giant Tesco has started selling the Galaxy S4 on its mobile network, which makes use of O2's spectrum. Prices start from £37 a month including unlimited texts and minutes, 1GB data and, most importantly, 1,000 Clubcard points.

Talktalk
Talktalk has done its rivals when it comes to pricing. It is offering the Samsung Galaxy S4 on tariffs starting at just £30 a month with no upfront charge, and started offering the phone on 27 April.

CloveUnlocked mobile phone seller Clove now has stock of the Samsung Galaxy S4, following previous stock issues. It can be ordered from its website now, priced at £579.99.

Carphone WarehousePopular retailer Carphone Warehouse, like most, began shipping the Samsung Galaxy S4 on 27 April. It's now taking orders on its websitewith pricing starting at £41 a month for the Galaxy S4 - with the first 2,000 buyers in line to receive a free Samsung Galaxy Tab 2. While the retailer's pay monthly pricing isn't all that bad - it is asking for a whopping £629.95 for a SIM free Galaxy S4.

Phones 4UUK mobile retailer Phones 4U started taking Samsung Galaxy S4 orders in April, with prices starting from £37 a month for a free Samsung Galaxy S4. Those who preorder via Phones 4u will also be treated to a free Google Play voucher, and the retailer says it has some in stock.

Amazon
Thankfully, Amazon has undercut Carphone Warehouse's £630 SIM free price-tag, and is instead asking for £589.99 for the 16GB model - still more expensive than Apple's iPhone 5.