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The presenting invention is defined by the claims below. 55 Embodiments of the present invention solve at least the above problems by providing a system and method for, among other things, creating opportunistic data transfer over heteroge neous wireless networks. The present invention has several practical applications in the technical arts including provid-60 ing multiple network interfaces to devices to communicate with each other using various policies, using a proxy to main tain a connection with a legacy system such that a data con nection to the legacy system may be continued when an end device connects with the proxy, and maintaining application 65 states when devices become disconnected such that their activities may be resumed when reconnected.