Yoip Softphone has come up with “Callingcard Dialer” for iPhone based Mobile phones. iPhone Calling Card Dialer lets the callers Automatic dial the access number, Pin of prepaid card and Destination Number. The iPhone dialer is meant for service providers who can use this Callingcard Dialer and get it integrated with their existing Callingcard server.. It works just like standard callingcard i.e. You may make a long distance phone call using a calling card or dial-through service .There is no need to remember your access numbers, Callingcard cards or PINs.