Mobile Dialer is a simple sip client. By using this application users can make voip call easily. The main features of this applications are- • Making VoIP calls to supported GSM number and to other sip clients. • Receiving a call from another sip clients. For using the main features the supporting features are- • Viewing Call logs and making call from call logs. • Viewing SMS logs and viewing previous SMS and forward SMS from the call log. • Viewing phone contacts to call a number from phonebook, send SMS and Topup.