Xiaomi has announced its 15 Ultra flagship phone with a starting price of 6,499 yuan.The highlight of the phone is the addition of a 200-megapixel periscope camera that excels in low light.The phone features a quad rear camera with a circular module, and the 200-megapixel periscopic lens offers improved zoom photography in lower light.Other features include a Snapdragon 8 Elite chipset, IP68 rating, and a 6,000mAh battery.