Question about Xiaomi Smart Band 9

A smartphone is required to activate the watch. After that, it works without one.

The Xiaomi Smart Band 9 can also be used without a smartphone. It can count steps, measure heart rate and oxygen saturation and monitor sleep without the need for a smartphone. However, it only offers the full range of functions, including the display of notifications and detailed data analysis, in conjunction with an Android or iOS smartphone and the Mi Fitness app.