We may change the notification tone that alerts us to new SMS messages or messaging from WhatsApp, among other things, at any time if the tone is already overheard.

There is a choice of pre-installed tones on the OnePlus smartphone, which can be expanded as desired thanks to the function for using a personal notification tone.

Note: To use a custom notification tone, such as an mp3 file, simply copy it to the internal memory of the device.
The folder path does not play a major role here, as the OnePlus smartphone automatically searches all file paths and displays the results.

Android 10 | OxygenOS 10.0
Change notification sound -  Open the  Settings
Change notification sound -  Tap on  Sounds & vibration
Change notification sound -  Tap on  Notification sound and vibration
Change notification sound -  Choose a  notification sound
  1. Open the Settings
  2. Tap on Sounds & vibration
  3. Tap on Notification sound and vibration
  4. Choose a notification sound

OnePlus Instructions