Why is there no SMS reminder for Lexin bracelet?

Binding succeeded. Call reminder setting (3 seconds vibration). When it opens, it will call a reminder. Start the millet movement, upper right corner

Just turn on Bluetooth to connect your phone. The incoming call reminder of the bracelet is connected via Bluetooth, which is the same as the principle of Bluetooth headset. When someone calls, Mambo HR will immediately vibrate to remind them, and the caller's name will be displayed on the bracelet screen.