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.
- LTE network acquisition improvements
Check your Settings menu, then System Update to get the latest download.