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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:

EE Harrier Mini review
EE's Harrier Mini is a budget 4G smartphone and the cheapest way to access EE's new Wi-Fi Calling service. It's a smart-looking handset with a brushed-metal-effect on the rear, and a large HD screen. Everything else is typical for the price, making it good value at 99 on PAYG.
 Samsung UE40JU6500 review
The Samsung UE40JU6500 is a 40-inch UHD TV with an absolutely stunning curved design. It definitely looks the part, and offers good picture quality and easy-to-use Smart TV too. Viewing angles are restricted however, and this effect is amplified by the screen curvature. At launch, the TV is seriously over-priced and we're hoping for a big price drop in time for Christmas.
Samsung UE40JU6400 review
The Samsung UE40JU6400 is a mid-range family TV that offers a good all-round viewing experience. There are some aspects that we didn't like, such as the narrow viewing angles, and the lack of Smart TV apps at launch. We also feel that UHD at this 40-inch size is an irrelevance. At launch it's over-priced, and we'd recommend waiting for the price to fall.
 Choosing a TV (updated)
Choosing a TV explained simply. Confused by 4K, UHD, HDR, quantum dots and Smart TV? We've updated our handy guide with the latest trends and developments for 2015.
Honor 6 Plus review
The Honor 6 Plus is exclusive to the Three network. It's an Android smartphone with a huge 5.5 inch screen and an elegant superslim design. It's a flagship device with an 8-core processor, dual rear cameras, plenty of memory and a whopping battery. But it's excellent value for money, selling for significantly less than rivals from other manufacturers.
 iD Mobile review
iD Mobile is a virtual mobile network from the Carphone Warehouse and operating on the Three network.
EE Harrier review
The Harrier smartphone is exclusive to EE and is a well-made device with a good balance of features. The exceptionally large screen is a highlight, as is the access to EE's 4G network and Wi-Fi Calling capability. It's quite expensive for what you get however, and is let down by poor camera performance.
 Microsoft Lumia 640 review
Microsoft is on a mission to deliver value-for-money smartphones, and the Lumia 640 gives you everything you need, for just a little over 100 on PAYG. With a big HD screen, quadcore processor, 8 megapixel camera, 4G connectivity and a large battery, there's nothing missing from our list of must-have features.
Sony Xperia E4 review
The Sony Xperia E4 is an entry-level phone that lacks 4G connectivity, but does offer a large screen, a capable camera, a big battery, and a decent amount of memory. It's available for under 100 on PAYG, or on the cheapest monthly contracts.
 HTC One M8s review
The HTC One M8s is the same as the One M8, but with a new camera, updated 64-bit 8-core processor, a larger battery and Android Lollipop. It's cheaper too! If you missed out on the M8, perhaps this is the upgrade you've been waiting for.

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