| 摘要 |
In a mobile telecommunication system information is recorded that indicates whether or not a mobile station is present at a predetermined geographical location. The telecommunication system transmits a charge modification signal if the mobile station to initiates a call when the location information indicates that the mobile station is present at the geographical location. The modification effects a differentiation between the overall charge for the call and a net charge to a subscriber of the mobile station, at the expense of a third party when the mobile station is present at the geographical location. Thus, a party, such as a supermarket, that does business on commercial premises is enabled to provide an incentive for consumers to enter the premises.
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