Bananaphone!

"And this is our latest model," said the cell phone guy, happily, "It's designed so that people who have the appropriate code - your boss, say, or maybe your spouse - can activate it over the phone and talk, or just listen, without you needing to answer. Sometimes jealous couples get these, but they'e especially popular for company cell phones. Soon, they'll replace normal cell phones."

"That sounds great, if that's what people want to do," I said, "But how do I know that it won't be used by some totalitarian regime to spy on the population?"

"Oh, we have a money-back guarantee if that happens," said the cell phone guy, proudly.