Many of us have been frustrated, to say the least, that there's no toggle switch to turn off the LTE radio in the HTC ThunderBolt like there is in, say, the Sprint EVO 4G or Epic 4G. You could open up the battery cover and pull the 4G SIM card, but that's ... what's the word ... work.
No matter. User cdunn05 over at the ThunderBolt Forums worked up the instructions to manually turn the LTE radio off while still leaving the 3G radio on using the following steps. It looks scarier than it is, and the best part is that it survives a reset. We've got full instructions in the ThunderBolt forums. [How to turn off ThunderBolt LTE] Thanks, cdunn05!