Yes, you can use mi band without a mobile phone. The bracelet has independent memory and can store data for one week. For example, when you are exercising, running and playing ball, all the sports data are recorded in the rice grains in the bracelet. When your bracelet is connected to your mobile phone again, all the data will be displayed in the APP on your mobile phone simultaneously.

The three functions of step counting, sleep counting and alarm clock do not need to be connected to the mobile phone all the time. For example, the alarm clock: write a hand ring when setting the Xiaomi Sports APP. After the setting is successful, there is no need to keep Bluetooth connected to the mobile phone.

Call reminder, screen unlocking, and looking for a bracelet all need to turn on the Bluetooth of the mobile phone and keep the connection with the mobile phone.