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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:

 
Microsoft Lumia 435 review
If you're looking for a smartphone costing around 50, your choices are very limited, but the Microsoft Lumia 435 gives you a lot for your money. It's a dinky phone with a decent screen, a dual-core processor and plenty of memory. The cameras are very poor and the battery life not much better, but it's good as a first phone or as a spare.
 Motorola Moto E 4G review
The second-generation Motorola Moto E is an entry-level smartphone that offers outstanding value for money. It may lack premium styling, but it has everything else you could want from a budget phone - and more.
   
 
Samsung Galaxy S6 Edge review
Just when you thought all smartphones looked the same, the Samsung Galaxy S6 Edge brings a fresh new look. Featuring a double-edged curved screen with special edge display features, it's one of the best-looking phones you can buy. It's also super-powerful, with an 8-core processor, outstanding cameras, plenty of memory and the latest Lollipop flavour of Android. But make sure you're sitting down before you look at the price!
 Samsung Galaxy S6 review (updated)
The Samsung Galaxy S6 brings premium metal-and-glass looks to Samsung's winning formula of a high-spec Android smartphone. The S6 features a stunning quad-HD AMOLED screen, an 8-core processor, enhanced cameras, Android Lollipop and a wealth of other features. The only things holding it back are the lack of expandable memory, and the rather average battery life.
   
 
Huawei Ascend G7 review
The Huawei Ascend G7 is a big-screen smartphone that's priced for value. Featuring an ultraslim metal casing, it looks good too. It's top features are its 5.5 inch HD display, outstanding battery life, high-spec cameras and quad-core processor. We rate this very highly if you're after a big screen but lack the budget for a flagship phone.
 HTC One M9 review (updated)
The HTC One M9 smartphone looks almost identical to the iconic One M8. The UltraPixel camera of the M8 has been replaced by a much better 20 megapixel main camera, and the processor has been upgraded to an octa-core Snapdragon 810. The M9 isn't a great leap forward, but is one step closer to perfection.
   
 
New responsive site design for mobile and tablets
We're pleased to announce the launch of of our new responsive site design for mobile and tablets!
 HTC Desire 820 review
The HTC Desire 820 gives a lot for your money - a powerful octa-core processor, a big 5.5 inch screen and an 8 megapixel front camera. But it's too big to become a mainstream phone.
   
 
Microsoft Lumia 535 review
Microsoft's first smartphone is the entry-level Lumia 535. Selling for less than 100, or on very cheap contracts, the phone has a lot going for it, including a huge 5 inch display, a 5 megapixel front camera and good battery life.
 Samsung Galaxy A3 review
The Galaxy A3 from Samsung is a mid-range phone with a premium metal design. It's compact, ultraslim, and exceptionally light in weight, but rather over-priced.
   

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