The LG Viper 4G LTE has a small update coming according to Sprint. Relax, it's not Jelly Bean. It's actually even better, as the update addresses LTE network acquisition improvements. This means that your Viper 4G should find and connect to LTE towers better, improving the data connection (and as a secondary, the battery life).
While an update that isn't full of bells and whistles, or a full on OS version update, isn't very exciting, they are pretty important. Keeping the phone working the way it was advertised is the best thing any of the manufacturers can do for us. If we want more, we can handle that ourselves.
Source: Sprint. Thanks, Tommy!