T-Mobile app lets Facebook users place voice calls to Facebook friends with their computers. Bobsled is “one of the first VoIP applications seamlessly integrated into Facebook Chat,” company says. The app can be downloaded for free from Facebook and doesn’t require a T-mobile account to use. The fourth-largest wireless carrier in the U.S. is in the process of being bought out by AT&T, which is expected to become the largest in the United States with more than 130 million subscribers.”]
Source: https://www.csoonline.com/article/2128138/t-mobile-brings-voip-capabilities-to-facebook.html