If desired, the camera flash can blink when an incoming call is received.

Android 9 (LG UX 9.0)
Step 1:  Open the  Settings
Step 2:  Tap on  Sound
Step 3:  Enable or Disable  Flash alert for incoming call
  1. Open the Settings
  2. Tap on Sound
  3. Enable or Disable Flash alert for incoming call

LG Instructions
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