T-Mobile and LG release another Jelly Bean update for the Optimus L9, hopefully the previous issues have been sorted out
The Optimus L9 may not be the most popular phone in LG's stable, but that didn't keep them from coordinating with T-Mobile and getting another Jelly Bean update ready to go for the device. The update is live and pushing out OTA to folks on the current 4.1.2 official firmware, as well as a package for folks still running the 4.0.4 firmware who skipped the last OTA that was quickly pulled.
This time around you'll be bumped to software version P76920f, which is still Android 4.1.2, but contains additional security enhancements according to T-Mobile. Hopefully, things will go a bit better than the last 4.1.2 update that was pulled because of battery and Wifi calling issues.
To check for your update, from the home screen press Menu > Settings > About device > System update and follow the prompts.
Source: T-Mobile; Thanks, Andrew!