Texas-based Privus Mobile, a provider of caller ID services and mobile apps for smart phones, has announced to be behind the world's first national rollout of mobile caller ID to Vietnam, according to RCR Wireless Austin.Privus said they has clinched a deal with Vietnamese digital media and communication companies, Media Hub and Smart Media, to make caller information available to 25 million of Vietnam's wireless users.The contract is expected to generate more than $21 million in revenue for Privus Mobile annually.Under the terms of the agreement, Media Hub and Smart Media will provide Privus Mobile with the caller names for both mobile and landline numbers within the country.This will allow Privus Mobile to apply data validation technology to deliver caller ID service to mobile users by matching numbers with names, regardless of whether or not the caller is in the recipient's contact list.Privus said that Vietnam already has complete 3G coverage and the country was listed by AdMob as o­ne of the 10 largest consumers of mobile Internet advertising data in the world. Nearly 80 percent of Vietnam's population uses a mobile phone, while o­nly o­ne-third uses landline phone services."Vietnam has shown incredible growth in its telecommunications infrastructure over the past few years, to the point that it's now introducing concepts and capabilities unlike any other country in the world, and we're excited to be a part of it," said Greg Smith, president of Privus Mobile."Vietnam's strong carrier system allows us to apply our technology across nearly every handset in the nation with unprecedented accuracy and effectiveness," he added.Privus also develops apps for the Android, BlackBerry, iOS, Symbian and Windows Mobile operating systems, providing caller ID information.