Nguyen Tuan Anh, a Vietnamese citizen from Hanoi, delivered mobile apps to about 800,000 phone owners, which would surreptitiously send short text messages to premium numbers. As a result of the business, the fraudster raked in more than $420,000/308,500 in about a year. Anh was the head of the sales department in a Vietnamese company and the apps offered to the mobile users contained adult content. Once the malicious apps were installed on the phone, they would start se…