Today AT&T has started rolling the October 2018 security patch for LG G6 (LG-H871). The update bumps the software version to H87121j and based on Android 8.0 Oreo. Now you can upgrade the AT&T LG G6 to October 2018 Security Patch.
H87121j: October 2018 Security Patch for AT&T LG G6 (LG-H871)
The update is currently rolling over the air in the US with AT&T network. This update brings nothing major changes except the security patch and bug fixes. If you have not received the update, then make sure to check for the software update manually. Follow our instructions on how to upgrade AT&T LG G6 to October 2018 Security Patch with H87121j.
Go to settings—> about phone —> system update
Before proceeding, please make sure your phone has enough charge of at least 50%, take a full backup before upgrading or downgrading your phone. To download the OTA file, you should be on a stable WiFi connection to enjoy uninterrupted software download.
If you have the OTA update on your AT&T LG G6, then we do recommend you to install the October 2018 security patch update to keep your phone safe from vulnerabilities. Well if you have no update, then you can even check our article on how to force download latest OTA updates on your device.