Today the vivo X500, X500 Pro, and X500 Pro Max went global, over a month after they debuted in China. But the company is apparently already busy with the next member of the family. Now, prolific tipster Digital Chat Station has revealed on Weibo that a "small s iteration" is in testing.According to DCS, the engineering sample has a 6.85-inch flat screen with 2K+ resolution, a 144Hz refresh rate, and equal-width bezels on all four sides. The tipster also says the device follows a "large-screen all-rounder" approach. He didn't name it, but people in the comments have taken it to mean the...