T-Mobile LG G Pad X 8.0 April security update
If you receive a notification that the update has arrived, make sure that you are connected to a Wi-Fi network before continuing with the updating process. In addition, you might want to make sure that your battery is fully charged before downloading the update and installing it.
Because the update is being sent out OTA, it is disseminated in waves. If you don't have enough patience to wait for a notification telling you that the update has arrived, you can see if the update can be coaxed out of your LG G Pad X 8.0 by going to Settings > About phone > Update Center > System updates > Check for Updates.