Patent ID: 7835746

Claim:
A method for providing a mobile telephony application to a mobile communication device in communication with a first network, comprising the step of transferring information related to the mobile telephony application between the mobile phone and a second network exchange, wherein the method comprises the further steps of: retrieving data on information transfer mechanisms supported by the mobile communication device; retrieving data on information transfer mechanisms supported by the first network; retrieving data on information transfer mechanisms supported by the second network; selecting an information transfer mechanism supported by the mobile communication device, the first network and the second network; initializing the mobile telephony application using the selected information transfer mechanism to relay the information between the mobile communication device and the second network exchange; wherein the selected information transfer mechanism comprises one or more of the group of Dual Tone Multiple Frequency; Direct Dial In; Unstructured Supplementary Services Data; Short Message Service, and wherein the mobile telephony application is a call back application allowing establishment of a connection between the mobile communication device and a further mobile communication device by intervention of the second network exchange, in which the step of initializing comprises the steps of: transferring a request for call back, the number to be called associated with the further mobile communication device and the number of the mobile communication device to the second network exchange; and accepting the call from the second network exchange to establish the connection.