In order not to miss any reminders for the appointments or events stored in the calendar app of the OnePlus smartphone, we can set a notification with sound and vibration at any time.

For this purpose, a pre-installed ringtone or a custom mp3 file can be selected and the vibration can be (de)activated independently.

Note: The sound and vibration settings are also applied to upcoming events such as birthdays.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Calendar app
Step 2:  Open the  menu
Step 3:  Open the  Settings
Step 4:  Tap on  General
Step 5:  Enable  Notify on this device
Step 6:  Tap on  Calendar notifications
Step 7:  Tap on  Advanced
Step 8:  Set a  sound  and enable or disable  Vibrate
  1. Open the Calendar app
  2. Open the menu
  3. Open the Settings
  4. Tap on General
  5. Enable Notify on this device
  6. Tap on Calendar notifications
  7. Tap on Advanced
  8. Set a sound and enable or disable Vibrate

OnePlus Instructions