(Telecompaper) Samsung has unveiled its latest flagship smartphones, the Galaxy S7 and Galaxy S7 Edge, at Mobile World Congress in Barcelona. The S7 offers a 5.1-inch screen and the S6 Edge a larger 5.5 inches, both Super Amoled with 1440x2560 pixel resolution (QHD), the same as the S6 family. In addition, the devices feature an 'always on' screen for checking notifications or the clock while using minimal battery, and the phones are dust- and waterproof with the IP68 certification. These are also the first to run Samsung's Exynos 8 processor with 64-bit architecture. Pre-orders for the smartphones start 23 February, and the phone will go on sale in shops around the world from 11 March.