Are you kidding? This congress can't pass anything, no matter how obviously reasonable.
So, yeah, anyway, I'll tell Congress to legalize unlocking phones. They may not listen as well as we'd like them to (and that's a huge problem), but they do listen when we bother to make our views as citizens known. It's how things like SOPA were kept at bay, etc.
There's also the option to call, by the way.
To make even more of an impact, call your Senators directly and tell them to support the bill! Call the Senate switchboard and ask for your state's representatives: (202) 224-3121.