Assigned speed dial numbers can be called on the LG smartphone by tapping and holding the respective speed dial number on the dial keys, the speed dial must be pressed until the call is automatically started.
Android 9 | LG UX 9.0
Speed dial numbers -  Open the  Phone -App
Speed dial numbers -  Tap and hold the  Speed dial number
  1. Open the Phone-App
  2. Tap and hold the Speed dial number

LG Instructions
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