Is there something built into the system I am missing, or a 3rd party app that might work? Free would be preferable, mainly because this seems like something that should be included in the functionality of the phone. Thanks!
Just tried 4G Toggle for RAZR. It works the same as LTE Switch. Both are just shortcuts to the Settings that allow you to change the mode. It's a little more convenient. But, I'd prefer an app that actually toggles the mode rather than taking me to the setting for me to do it myself. But, I can live with these apps.
I think the OP's original question was a easy one-button widget switch that switches 4G on and off, without having to go through all the Settings menus.
As an FYI, I've been using SwitchPro for a long time prior to my GN, but the 4G toggle does not work with the Galaxy Nexus. The Lock/No Lock switch occasionally works. Otherwise, the widget is great. Perhaps a future update from the developer may fix this.