Vopium today announced its latest application to the iPhone, enabling users to make free and cheap international calls. Powered by mobile VoIP and Wi-Fi technology, Vopium is now available in Apple’s App Store.
Once you downloaded application and registered, you will receive 30 minutes of free calls and 30 text messages (SMS). According to Tanveer Sharif, Vopium’s CEO, at least 500 devices already supported this application.
Once the Vopium application is downloaded to the iPhone, it is tightly integrated with the user’s address book. When an international number is dialed, the call is made using the cheapest method available while preserving the highest call quality. When using Wi-Fi, Vopium iPhone users can call other Vopium Wi-Fi users for free, regardless of the brand/model of their device.
iPhone users can download the application from the Apple App Store.
It’s a well written article.VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech .