If we want to change the notification tones on the Xiaomi smartphone, we can choose between nature sounds, a chime, xylophone sounds, or any of the pre-installed ringtones. If two SIM cards are used on the device, we can set a separate ringtone/notification tone for each SIM card for the dual-SIM function.

Note: In this guide we will activate Dual SIM and select an individual tone for one SIM card, other options can be accessed in the same way.

Android 10 (MIUI 12.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Sound & vibration
Step 3:  Tap on  Notifications
Step 4:  Tap on  All ringtones
Step 5:  Choose a  notification sound
  1. Open the Settings
  2. Tap on Sound & vibration
  3. Tap on Notifications
  4. Tap on All ringtones
  5. Choose a notification sound

Xiaomi Instructions