We have the same thing under the Wireless Network settings. You have the option for LTE/CDMA or CDMA only. Ours come built in (LG Revo does also.) The TB's setting had to be added by the Dev community.
I know there is such setting but it makes phone reboot after change. LTE onoff developed for Tbolt actually does seamless data toggle to 4G/CDMA, 3G without having to reboot. I just like to see such app for Charge, Revo come.
