ExclusiveHuawei introduces the world’s slimmest smartphone News Mark - June 19, 2013 Huawei has announced what it’s describing as the world’s slimmest smartphone. The Huawei Ascend P6 is just 6.18mm deep, compared with 7.6mm for the iPhone 5. It runs Android on a 1.5GHz quad-core processor and has a 4.7-inch HD screen.