Cell phone numbers are generally not listed in telephone directories for reasons of maintaining confidentiality. In fact the very reason people go in for cell phones is because it offers them privacy. With a cell phone you can virtually choose people whose calls you would like to receive. No longer need you worry about being hassled by unwanted telemarketing agents, constantly pestering you to buy the most mundane things at all the wrong times. Such intrusion of privacy is not possible with a cell phone, to a large extent. Note the word