What if the breathing light of Xiaomi 4 doesn't light up? It only lights up when charging, and the text message doesn't light up when you don't answer the phone.

The breathing light of Xiaomi 4 is located at the Home button in the middle of the bottom of the screen.

It should be noted that the breathing light brightness of Xiaomi 4 is not very high, so it may not be obvious during the day under strong light, but it is quite obvious when it is placed in weak light or seen at night.

1. Enter Xiaomi 4 setting, and then select "breathing light" setting, as shown in the following figure:

2. After that, turn on the option of "The indicator flashes when receiving the notice", and you can also set the breathing light color yourself in the future. After turning on the phone, the breathing light of Xiaomi 4 will flash when there are notifications such as short messages or missed calls.