Update the PRL (Preferred Roaming List) on your device for the LG Stylo 3
From the home screen, use two fingers to swipe down the Status bar.
Tap the Settings icon.
Note: If only one finger was used to swipe down on the Status bar, swipe down again to open the Quick Settings menu.
In the General tab, scroll to and tap System updates.
Tap Update PRL.
Once the PRL update is complete, tap OK.
The PRL is now up to date.