LG G5 on AT&T carrier is receiving an update that include multiple fixes and improvements. The update is based on Android 7.0 Nougat, brings version H82020n that installs, April security patch and much more. The update also brings support for Wireless Internet Service Provider roaming (WISPr) that allows you to access the roaming service for wireless internet just similar like cellular networks. Other improvements beside WISPr includes fix for RTT (Real Time Text).
If you own an AT&T LG G5, what are you waiting for, just go to Settings > About device > System updates. You should have a working WiFi connection to download the update. The H82020n firmware weighs about 378MB so keep your battery well charged to avoid shutting down during the installation process.