Why doesn't Xiaomi bracelet 2 have caller ID?

If Xiaomi bracelet 2 has caller ID function, the setup steps are as follows:

1. Update Xiaomi Sports to version 2.2.7 or above, and support the display of contact name or number information of incoming calls and SMS reminders in simplified Chinese environment, and the incoming number will be scrolled on the bracelet screen;

2. Turn on the incoming call reminder in smart play, and turn on the switch for displaying contact information;

3. Keep the Bluetooth of the mobile phone turned on, the Xiaomi movement runs in the background, and the bracelet will display the contact name when the call comes.