Quick note, LG Viper owners: If you're getting an update request this afternoon, don't get too excited. The newest software addition isn't any flavor of Jelly Bean. It's just a small update that addresses "LTE network acquisition improvements", which probably means it'll help you when transitioning from Sprint's old and busted 3G network to the new LTE hotness.
LS840ZVK 2/7/2013
- LTE network acquisition improvements
Check your Settings menu, then System Update to get the latest download. If you aren't seeing it right away, remember that carriers tend to deploy these things in waves. You might want to sit this one out if you're rooted, especially if you're not one of the lucky few within Sprint's LTE service area.