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Welcome to S21

S21 is a technology website bringing together hundreds of independent expert reviews, over 100,000 user reviews, plus articles, buying guides and links to the best online deals. Looks familiar? We used to be Mobile Phones UK - reviewing mobile technology since 2001.

Latest reviews and articles:

Samsung Galaxy S5 review (updated)
The Samsung Galaxy S5 launched in the UK on 11 April. It's the fastest, most powerful Galaxy smartphone ever, with a stylish new look, fingerprint and heart rate scanners, ultra-fast camera and extended battery life.
 HTC One M8 review
The HTC One M8 builds on last year's One with a premium metal design, superb stereo audio, blazing fast performance and Android KitKat with BlinkFeed. The camera is unique, with a second lens to capture depth information and Ultrapixels for low light performance.
Is competition working in the mobile phone market?
Today we're taking a look at how well competition works in the mobile phone market. Does competition between network operators work in favour of the consumer?
 Nokia Lumia 1320 review
An affordable Windows Phone 8 phablet with an enormous 6 inch screen, but a modest price tag. The Lumia 1320 is a well-built device with a good featureset and plenty of bundled software. Only the large bulk and weight distract from its appeal.
Sony Xperia Z2 review (updated)
The Sony Xperia Z2 has the same aluminium and plate glass design of the Z1 and is waterproof and dustproof. It's one of the best camera phones ever, able to record 4K UHD video. The phone also has a slightly larger 5.2 inch IPS display with Sony's new Live Colour LED technology. It'll be available in the UK in April.
 LG G Flex review
The future's bright, the future's curved, or so the Koreans would have us believe. LG is giving us a taste of flexible OLED screens with the G Flex smartphone. It's interesting for sure, but just serves to demonstrate some of the teething problems of this new technology.
Sony Xperia Z2 Tablet review
Sony's new Xperia Z2 tablet is the slimmest, lightest 10 inch tab, and it's waterproof too! Faster than before, with more memory, it also features superb sound, camera, battery life and connectivity. It'll be available in April and we'll be reviewing it in more detail then. Yum!
 The highs and lows of MWC 2014
The good, the bad and the ugly from Mobile World Congress 2014.
Top 5 home and smartphone security apps
Here S21 looks at the top 5 apps for home and smartphone security.
 Mobile phones with lowest SAR values
The top 10 cell phones and smartphones with the lowest SAR values (radiation levels).

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