The update brings some bug fixes which were available in the previous build. It also brings stability and performance improvements. Thus, you should download and install the update to your AT&T LG Phoenix Plus / K30 which will come as an OTA update to your phone. It is not a major update so it weighs around 503 MB and comes with Build number: PKQ1.190522.001 There are two types of Android Software Updates 1) Major Updates like Newer Android Versions Pie or Q 2) Incremental Updates (Security Patch Updates). Security patch updates are very important for Android devices as they come with many fixes of security issues which keep the device safe from malware attacks. So both of these updates are equally important for any devices.
About AT&T LG Phoenix Plus / K30 X410AS20c December 2019 Security Patch
Release date: December 12, 2019 Android version: 9 Security patch level (SPL): December 1, 2019 Build number: PKQ1.190522.001 Software version: X410AS20c File size: 503MB
Changelog
Updated to December 2019 security patch
Manually Update AT&T LG Phoenix Plus / K30 to X410AS20c December 2019 Security Patch
You can manually check for the update from Settings > General > About Phone > Update Center. If there is no update showing on your device, then wait for a few days for the update to come to your device as it is being released phase-wise manner. Source: AT&T Before installing the updates, make sure your device is connected to a good wifi and your device has more than 50 percent battery life remaining