To ensure the best possible reception on your LG, it is recommended that you let the network be selected automatically. The LG always prefers to use the home network. If reception is too weak or breaks down, the device can also dial into a foreign network.

Note: This function should be used with caution near the border, especially with Switzerland; even in your home country, the device may be able to dial into a network in the neighboring country and may cause additional costs.

Android 9 | LG UX 9.0
Select network automatically -  Open the  Settings
Select network automatically -  Tap on  Mobile networks
Select network automatically -  Tap on  Network operators
Select network automatically -  Tap on  Select automatically
  1. Open the Settings
  2. Tap on Mobile networks
  3. Tap on Network operators
  4. Tap on Select automatically

LG Instructions