Xiaomi has announced its 15 Ultra flagship phone at a launch event in China, where it’s going on sale starting at 6,499 yuan (around $893). The Android phone joins the company’s Xiaomi 15 and 15 Pro, which went on sale there in October 2024. It is a mostly iterative upgrade on last year’s model, but the big change is the addition of a 200-megapixel periscope camera that the company says excels in low light. The 15 series, including the Ultra, is getting an international launch this Sunday, March 2nd, at Mobile World Congress in Barcelona. Exactly which markets it will...