Just in time for Tante Lulu's birthday in Gstaad, Vonage launched its Extensions app for free long-distance calling from your Android phone. With a quick download, homesick relatives can tap into their existing Vonage VoIP service from a Google-powered phone to call globally without racking up terribly expensive additional mobile charges. The catch? It requires a VoIP international calling plan before you can start dialing friends worldwide. Also, pricing is subject to your existing
