The disclosed systems and methods include a native portable communications device having an application module that modifies communications between the portable device and a non-native communications device connected to a non-native communications network. The application module transforms communications between a native standard to a non-native standard to allow interoperability between the native portable communications device and the non-native communications device within the non-native communications network. Further, the application module may modify communications in other manners, such as to apply a security function to the communication. Additionally, the systems and methods may include a communications accessory for switching communications between the application module of the native device, the non-native device, and the non-native network. Thus, the native portable communications device and the associated methods of operation with the application module provide a mobile system that enables modified communications over various communications networks.