Holy crap, people!! The technology is not some secret, nor any kind of jammer. It prevents incoming driver phone notifications or ringing by blocking them and sends a text to callers that you're driving. PLEASE start READING about things instead of dreaming up shit. Educate yourself! It's all out there to read. I can't understand why anyone would put money into a company whose technology is not understood and evaluated.
I agree, there are many ways to get around a call besides jamming/blocking the signal. The cell would still be needed for 911 or simple navigation purposes.