Yoip Softphone has come up with "BlackBerry Sip Client (Voip)" for BlackBerry based Mobile phones. Yoip BlackBerry softphone lets the callers make VoIP calls through their standard Mobile phones. The BlackBerry dialer is meant for service providers who can use this Softphone and get it integrated with their existing SIP servers. It works just like standard SIP Softphones i.e. it gets registered on the SIP server and then let the authentic caller makes calls. The biggest advantage that this Blackberry voip client provides is the huge base of potential customers who can now make calls using their standard mobile phones. The mobile phones need to be connected to the internet either through Wi-Fi/3G.