USB (wired) tethering is supposed to be built-in to Froyo, Android 2.2. I have a rooted Optimus M with 2.2. But that feature isn't enabled on my phone. What ROM can I use to get this feature? From an older posts, this currently doesn't work with custom ROMs. Is that still the case? I know I can use Proxoid or PDANet but I'd rather not use an extra app.