Michael Pearse and Yongchao Liu have been extradited to the United States from Australia, to face charges over their alleged roles in a scheme to swindle hundreds of thousands of mobile phone users, out of more than 64.6 million. They allegedly used a practice called “auto-subscribing” to charge monthly fees for unsolicited messages about celebrity gossip, horoscopes, jokes, love tips and trivia, without customers’ knowledge or permission.