It's not the latest, greatest, biggest or fastest device out there, but the LG Optimus L9 on T-Mobile will benefit from an update to Jelly Bean just the same. Today the carrier announced via a support page document that the move to 4.1.2 will be coming OTA (Over The Air) to devices starting today. The European models of the L9 started receiving the update just last week, so it's nice to see a U.S. variant fall right in line.
There aren't too many specifics on the T-Mobile support page about the update, other than the fact that you'll need over 50-percent battery to accept the OTA and that you'll be downloading a sizeable 350MB file for it. Have an Optimus L9 on T-Mobile? Keep an eye out for this update, or drop a comment below if you've already received it.
Source: T-Mobile Support