Transfer Audio Files from a PC:

  1. Connect the Android device to the PC via USB
  2. On the phone, enable “File Transfer” / “Media device” at the prompt or from the Notification area
  3. Open the File Explorer on the computer
  4. Navigate to the audio files on the PC storage
  5. Copy and paste the desired files to the phone storage in the “Ringtones” and “Notifications” folders
  6. Once done, eject the phone storage and safely disconnect the device from the USB port

Change the General Ringtone:

  1. Open “Settings”
  2. Go to “Sound & notification”
  3. Select the desired ringtone and tap “OK”
  4. Optionally, enable or disable “Also vibrate for calls”

Change a Specific Contact’s Ringtone:

NOTE: You can’t set custom ringtones for contacts located on the SIM card or the phone’s internal memory.

  1. Open “Contacts”
  2. Tap and hold the desired contact
  3. Tap “Edit” > “Menu”
  4. Tap “Set ringtone” and select the desired ringtone
  5. Tap “OK”

Change the Notification Alert Sound:

  1. Open “Settings”
  2. Go to “Sound & Notification”
  3. Tap “Default notification ringtone”
  4. Select the desired notification
  5. Tap “OK”

See More: Xiaomi Mi A2 Lite: Transfer Audio Files from a PC and Set Custom Ringtones & Notifications