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S21 is a technology website bringing together hundreds of independent expert reviews of smartphones, tablets, TVs and appliances, plus over 100,000 user reviews, and 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:

Sony Xperia M5 review Samsung Galaxy Ace 4 Neo review
Sony Xperia M5 review
The Sony Xperia M5 offers most of the features of the flagship Z5, but for substantially less money. Its super-slim design is very nearly the same, and its 21.5 megapixel camera with 4K video makes the M5 one of Sony's best ever camera phones. The 8-core Helio X10 processor isn't quite as fast as the Snapdragon 810 used in top-end phones, and the memory is just 16GB, but for the price, we think that it offers exceptional performance. Click for more
 Samsung Galaxy Ace 4 Neo review
You might think that the Galaxy Ace 4 Neo is an updated version of Samsung's popular Ace 4 smartphone. Instead, it's a downgraded version with very poor performance. Everything is below par, even when considering the phone's low price. There are a number of decent smartphones available for less than 100, but the Ace 4 Neo isn't one of them. Click for more
How to switch energy suppliers Humax FVP-4000T review
How to switch energy suppliers
Changing your electricity and gas supplier is a lot easier than you may think. Big savings can be made for very little effort if you're willing to make the switch. Click for more
 Humax FVP-4000T review
The Humax FVP-4000T is a Freeview Play box with three HD tuners, and access to catch-up TV from the BBC iPlayer, ITV Player, and All 4, with Demand 5 coming soon. It benefits from built-in Wi-Fi, but it's odd coffee-coloured design won't make it everyone's favourite. Click for more
Amazon Prime Instant Video review Netflix UK review
Amazon Prime Instant Video review
Amazon Prime Instant Video is our favourite streaming service. For a modest annual fee, you get access to a wide range of films and TV series, including top-quality original content from Amazon. The ability to download video to a phone or tablet is a major benefit, as is the availability of 4K and even HDR video at no extra cost. Click for more
 Netflix UK review
Netflix offers a choice of thousands of TV series and movies, available in HD or UHD. You can stream to your TV, PC, phone or tablet, and all the content is available for a flat monthly fee. Netflix is a streaming content pioneer, offering original series not available elsewhere. Click for more
Microsoft Lumia 550 review Microsoft Lumia 950 review
Microsoft Lumia 550 review
The Microsoft Lumia 550 is an entry-level phone running the Windows Phone 10 operating system. Available for around 100 and on the cheapest Pay Monthly contracts, it offers the basic features required from a smartphone, but is limited by a slow processor and a lack of apps. Click for more
 Microsoft Lumia 950 review
The Microsoft Lumia 950 is the first phone to feature Windows Phone 10. It's a highly capable phone, with a powerful processor, an excellent 5.2 inch screen, outstanding camera, plenty of memory, and good battery life. Two things let it down - its plastic build, and the scarcity of third-party apps. Click for more
Samsung Galaxy S5 Neo review Apple iPad Pro review
Samsung Galaxy S5 Neo review
The Samsung Galaxy S5 Neo is a 2015 reboot of Samsung's S5 flagship smartphone from 2014. The Neo is almost identical to the original S5, but has an octa-core processor, an adaptive screen and an improved selfie camera. It's available in a choice of Black, Silver or Gold, and is cheaper to buy than the S5! Click for more
 Apple iPad Pro review
The Apple iPad Pro pushes the capability of the iPad into new territory. The Pro is significantly larger, faster and more powerful than other tablets, and comes close to the potential of a MacBook, especially with the addition of the optional Smart Keyboard. Priced competitively, the Pro offers a lightweight alternative to a laptop. Click for more

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