A method for automatic electronic payment based on the detection of a mobile station adapted to operate in a cellular telecommunications network, comprising the steps of: - transmitting , on the part of a transmitter associated with a Near Field Focused - NFF - base station , which is not part of said cellular telecommunications network and which does not connect outgoing or uplink calls, a signal that indicates the presence of said NFF base station by mimicking the signal of a base station of said cellular network; - detecting , on the part of a receiver associated with said NFF base station , a request for connection to said NFF base station that originates from said mobile station ; - transmitting , on the part of said transmitter , an identity request signal to said mobile station ; - detecting , on the part of said receiver , an identity reply signal sent by said mobile station ; - determining identification data of a subscriber who is associated with said mobile station on the basis of said detected identity reply signal; and - billing said subscriber on the basis of said determined subscriber identification data, wherein said billing step comprises the steps that consist in: a) sending , on the part of a communications device associated with said NFF base station , said subscriber identification data and an amount to be paid to a subscriber server ; b) extracting , on the part of said subscriber server , a plurality of billing parameters associated with said subscriber ; c) sending , on the part of said subscriber server , said plurality of billing parameters and said amount to be paid to a payment server ; and d) billing , on the part of said payment server , said amount to be paid to said subscriber on the basis of said plurality of payment parameters. - transmitting , on the part of a transmitter associated with a Near Field Focused - NFF - base station , which is not part of said cellular telecommunications network and which does not connect outgoing or uplink calls, a signal that indicates the presence of said NFF base station by mimicking the signal of a base station of said cellular network; - detecting , on the part of a receiver associated with said NFF base station , a request for connection to said NFF base station that originates from said mobile station ; - transmitting , on the part of said transmitter , an identity request signal to said mobile station ; - detecting , on the part of said receiver , an identity reply signal sent by said mobile station ; - determining identification data of a subscriber who is associated with said mobile station on the basis of said detected identity reply signal; and - billing said subscriber on the basis of said determined subscriber identification data, a) sending , on the part of a communications device associated with said NFF base station , said subscriber identification data and an amount to be paid to a subscriber server ; b) extracting , on the part of said subscriber server , a plurality of billing parameters associated with said subscriber ; c) sending , on the part of said subscriber server , said plurality of billing parameters and said amount to be paid to a payment server ; and d) billing , on the part of said payment server , said amount to be paid to said subscriber on the basis of said plurality of payment parameters. <EOS>