For example, the US company Verint sells cell phone tracking systems to both corporations and governments worldwide. The company's website says that it's 'a global leader in Actionable Intelligence solutions for customer engagement optimization, security intelligence, and fraud, risk and compliance,' with clients in 'more than 10,000 organizations in over 180 countries.' The UK company Cobham sells a system that allows someone to send a 'blind' call to a phone—one that doesn't ring, and isn't detectable. The blind call forces the phone to transmit on a certain frequency, allowing the sender to track that phone to within one meter. The company boasts government customers in Algeria, Brunei, Ghana, Pakistan, Saudi Arabia, Singapore, and the United States. Defentek, a company mysteriously registered in Panama, sells a system that can 'locate and track any phone number in the world…undetected and unknown by the network, carrier, or the target.' It's not an idle boast; telecommunications researcher Tobias Engel demonstrated the same capability at a hacker conference in 2008. Criminals can purchase illicit products to let them do the same today.