VoIP-over-3G app Viber broke down in tears when it learned that, after Android, iOS and Windows Phone, there were no new worlds to conquer. Then a helpful soul pointed out that there were more than 1.5 Billion S40 devices in the world, and it set about adding that to the existing 100 million users of its service. In addition, it's bringing its free-calls platform to Symbian and Bada handsets while current Nokia Lumi
