20090061859 | PROVIDING AND CHARGING FOR DATA SERVICES IN ROAMING NETWORK ENVIRONMENTS - A method provides detecting a roaming operator by a mobile communications device, where the mobile communications device is associated with a home operator; receiving a data service, by the mobile communications device, provided by the roaming operator independent of the home operator; sending information, from the mobile communications device, to the roaming operator for the roaming operator to authenticate the mobile communications device with the home operator; and receiving a voice service, by the mobile communications device, provided by the roaming operator based on the authentication by the roaming operator of the mobile communications device with the home operator. | 03-05-2009 |