facebook voip click2call app

Hello, I am looking for someone who can develop a facebook app . The main goal of the app is to create a button and when people click on it they will be prompted to enter their phone number and then they will be connected to the owner of the button . You can check a demo of the button on the page [login to view URL] in contact call me for free tab . Please bid only if you developed a facebook app before and i need a demo of your apps before i accept your bid . Thanks and Regards Perplenu Solutions .