A stronger battery and expandable memory distinguish Samsung's new top smartphone models, the Galaxy S7 and S7 Edge. Visually, the two smartphones showcased at the recent Mobile World Congress in Barcelona differ little from their predecessors.

While the battery still can’t be removed, the phone’s memory can now be expanded via SD card.

The cases are still made out of aluminium but the screens are now Gorilla Glass 4 which is supposed not to splinter even in violent falls. The phones also have improved water-proofing.

The Galaxy S7 comes with a 5.1-inch display while the Edge with its rounded edges is slightly bigger at 5.5 inches. Both screens have a resolution of 2560 x 1440 pixels. The operating system is the latest version of Android, 6.0.1.

The camera has undergone a major change. It actually has fewer megapixels than its predecessor - down to 12 from 16 previously - but Samsung says the f/1 aperture and larger pixels mean that 95 per cent more light reach the system, resulting in better images.

As well, the camera lens that used to stick several millimetres out of the housing now protrudes by just half a millimetre.

Thanks to new chips, Samsung promises a third more processing power and graphic performance also improved by two-thirds. Gaming on the phones will also be improved by the new Vulkan API which is said to make games sharper while conserving battery life.

Samsung is also targeting mobile gamers by combining the new smartphones with their Virtual Reality headset Gear VR.

Both phones are available from March with the Galaxy S7 expected to retail for around 700 euros (765 dollars) and the Edge version for around 100 euros more.

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