SPIRIT DSP’s mobile VoIP client Viber hits 15 million users in 4 months
SPIRIT DSP’s mobile VoIP client Viber hits 15 million users in 4 months. TeamSpirit voice engine mobile provides high definition mobile VoIP calling to Viber’s iPhone and Android smartphone users. Viber’s free mobile VoIP app can make calls over 3G and Wi-Fi connections, bypassing the use of any cellular voice minutes; calls are free worldwide. Unlike other VoIP services such as Skype, Viber requires no registration or need to log-in to make calls.