In our office, we are going to install VoIP system. We have consulted one VoIP solution provider in Canada named ThinkTel Communications. Initially, we were thinking of VoIP phones. But we are also considering software based VoIP. So that we can use the call facility both in our system and smartphones. I am using Skype call on my smartphone. How about the quality of VoIP in smartphones? If somebody is using software based VoIP, please share the feedback.