Multi-Agent negotiation system has become the core of the intelligent e-commerce. A Virtual conference is the process where several agents meet virtually using electronic devices such as computer, mobile etc. Decision making is one of the most fundamental issues in Multi-Agent negotiation system for the virtual conference of Electronic markets. A negotiation protocol is used for planning and decision making. In this paper, we present a distributed Multi-Agent decision making system for mobile devices. We present an architecture that supports virtual conference decision making system using mobile phones. We also provide an algorithm that helps for making decision regarding to a specific agenda proposed by an individual participating in the virtual conference. Finally, we implement our system in a Blackberry platform.