Patent ID: 6741872
Filing Date: 2004-05-25
Classification: H04W

Abstract:
A method of authorizing access to a public radio network, the method comprising the steps of:initializing service during which a subscriber to the network supplies the network with data representing a serial number specific to a simplified mobile telephone adapted to operate in the network with no subscriber identification module and including at least one key for calling a predefined telephone number having a plurality of digits, and with data corresponding to said predefined telephone number, wherein the data representing the serial number and the data corresponding to said predefined telephone number is stored in the network; logging said simplified mobile telephone onto said network by transmitting to the network by radio the data representing the serial number and a first code representing a service number for connecting to the service, connecting the network to the service and then comparing the data representing the serial number transmitted by the simplified mobile telephone with the data representing the serial number stored in the network, authorizing logging on if there is a match between the data representing the serial number received from the simplified mobile telephone with the data representing the serial number stored in the network, transmitting an authorization code to the simplified mobile telephone by radio, and storing said authorization code in the network and the simplified mobile phone; and making an outgoing call to said predetermined number from said simplified mobile telephone by transmitting to the network, in response to actuation of said key of the simplified mobile phone, the first code representing the service number for connecting to said service, said authorization code and a second code associated with the actuated key which is not the digits of said predefined telephone number, the network connecting to the service and then comparing the authorization code transmitted by the simplified mobile telephone with the authorization code stored in the network, determining if said second code corresponds to the predefined telephone number stored in the network if there is a match between the authorization code transmitted by the simplified mobile telephone and the authorization code stored in the network, and setting up the call between the simplified mobile and the predetermined number.