These days, there are Meizu MX 2, Nokia's Lumia 920, Apple's iPhone 5, Bubugao's VIVO X1, LG's NEXUS 4 and so on. At noon one day, my colleague came with a mobile phone. From the appearance, there was no "birth certificate", but he said it was a waterproof mobile phone, and Xiaobian casually left it in the sink for more than half a year