Most of the world is probably familiar with 13 being the unlucky number, but for those with Chinese or even East Asian heritage, the unlucky number comes a lot much sooner. Case in point is the OnePlus' next flagship. Based on a certification in China, that will be the OnePlus 5, which will follow last year's OnePlus 3. If you're wondering whatever happened to the OnePlus 4, it didn't get scrapped. It just never existed at all. That's because in China and other East Asian countries, the number 4, not 13, is considered deadly unlucky.