Okay I received my rezound yesterday and am loving it. I am looking for a LTE on off widget so I don't have to go through the menus. I plan on using LTE only when I need the faster data like for streaming YouTube.
Switch it is what I use. For some reason I don't see LTE switch on the market anymore. You won't be getting a toggle widget like wifi or bluetooth. It is just a faster way to open a setting. You want to toggle between CDMA LTE when you want 4g, and CDMA auto when you don't. DO NOT use WCDMA or you may start to get a bootlooping issue. If this ever happens, pull the battery & SIM card, boot up with the battery cover off, and then go back in with Switch It and select one of the two options again.
My Rezound has a tendency to randomly put itself in WCDMA mode after changing from the standard to extended battery.
I like 4g Toggle. Even though it obviously can't work as a toggle. I like it because unlike others I tried, you only see the two options you want in the drop down (CDMA LTE, CDMA Only.)
Also, I think HTC screwed up their WiFi toggle in this version of Sense because the description for the widget says "Toggle WiFi on/off". Also I asked One S owners how their widget worked and they confirmed it Toggles in Sense 4.