Cheap Unlimited calls to Viet Nam for just 0 ¢ per minute with no contracts or hidden charges. Phone Viet Nam for less with iTalkWorld — Signup Now. iTalkWorld is Cheaper than your calling Card. How to Place Cheap Calls to Viet Nam ? 1) Local Access Numbers Check List of Countries 2) PC and Mobile Apps From Anywhere in world, for PC Dialer Click here for Mobile Dialer Click here