When using an app, an incoming call is announced via a banner. this banner can also be hidden during play, provided that the game tools are activated and the notifications are deactivated.

Android 9 (LG UX 9.0)
Step 1:  Open the  Navigation bar
Step 2:  Tap on  Game tools
Step 3:  Enable or Disable  Show banner for calls
  1. Open the Navigation bar
  2. Tap on Game tools
  3. Enable or Disable Show banner for calls

LG Instructions
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