No service? Maybe you got tapped by a cell phone jammer.A Philadelphia man sparked controversy after frequently using a device on a public bus to create a cell phone dead zone.

A reporter from NBC10 in Philadelphia recently tracked down the man who used a cell phone jammer on the bus to block drivers’ cell phone reception. His reason – he didn’t want to hear other people’s phone calls. He says he will turn on the illegal device when other passengers speak too loudly and disturb him.