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When it comes to mobile phones, there's often a tradeoff between a big display and a tactile keyboard, but not where the Samsung Cave smartphone is concerned. This concept handset by Kim Min Seok provides the user with sizable oval touchscreen, bordered by a cleverly arranged curving QWERTY keyboard.

To use space more efficiently within a mobile phone that's already quite large, the designer manipulated the device's overall form beyond the conventional template of a cellphone. Taking an increasingly more three dimensional shape, it's able to incorporate a 30% slanted keypad that optimizes the size of each button. The Samsung Cave smartphone aims to afford users the ultimate tool for multitasking with the benefit of intuitive operation.