The Xiaomi Mi 11 Ultra is a flagship device from the Chinese electronics manufacturer, Xiaomi. It features a 6.81-inch AMOLED display with a 120Hz refresh rate and a QHD+ resolution. It is powered by a Snapdragon 888 chipset, 12GB of RAM,
From Wikipedia
Xiaomi Mi 11 Ultra is an Android high-end smartphone developed by Xiaomi, released in April 2021. It serves as the successor to the Xiaomi Mi 10 Ultra. Unlike its China-only predecessor, the Mi 11 Ultra is available for retail in the global market.