| 摘要 |
A method of obtaining the directory number (such as the MSISDN) of a mobile device registered with a mobile communication network. The method comprises: causing the mobile device to disconnect from the network and connect with a separately introduced transmitter which is not under the control of the network; sending a request to the mobile device from the separately introduced transmitter, the request including an identification of a convenient device, and causing the mobile device to transmit a response to the network, which in turn causes the network to retrieve the directory number of the mobile device from a database and transmit it to the convenient device; and receiving the directory number from the network at the convenient device.
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