By default, the LG smartphone automatically checks for new software updates, but you can also start a manual search for new updates.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  General
Step 3:  Tap on  Update center
Step 4:  Tap on  Software Update
Step 5:  Tap on  Check now for update
  1. Open the Settings
  2. Tap on General
  3. Tap on Update center
  4. Tap on Software Update
  5. Tap on Check now for update

LG Instructions