PDAnet has a feature where it tries to hide tethering from the carrier. This might or might not be useful to you.
I tried to download it, but on the market it says it has been blocked by my service provider (Sprint). I have an Evo 3D, and I'm trying to do as little as possible to be able to make it a wireless hotspot. If I just unlock it via HTC's unlocked bootloader method, will I be able to load a wireless tethering app?