If the Oppo smartphone's screen is off (idle) or locked, we can make the camera flash blink for incoming calls.

Android 10 | ColorOS 7.0
Step 1:  Open the  Phone -App
Step 2:  Open the  Menu
Step 3:  Tap on  Settings
Step 4:  Enable or Disable  Flash on Call
  1. Open the Phone-App
  2. Open the Menu
  3. Tap on Settings
  4. Enable or Disable Flash on Call

Oppo Instructions
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