> He usually starts the class by asking people if they know when their phones are communicating with cell towers. “Most people say, ‘When I use it,’ but the ans

> He usually starts the class by asking people if they know when their phones are communicating with cell towers. “Most people say, ‘When I use it,’ but the answer is, ‘anytime it’s on,’” he says. is it using so much power when "off" the above isn't believable :P