Mobile telephone device system having steal prevention function

Details Mobile telephone device system having steal prevention function Mobile telephone device system having steal prevention function

1995-11-29

1997-07-08

Cumming, William

Telecommunications

Radiotelephone system

Security or fraud prevention

455565, 455566, 455572, H04Q 720, H04Q 732

Patent

active

056469772

ABSTRACT:
In a mobile telephone device having a preassigned call number and comprising a power supply unit, a keyboard section, a display section, a power key, and a control section, the mobile telephone device transmits, on position registration operation, a position registration signal including the preassigned call number to the base station and receives an information signal from the base station as a result of the position registration operation. The information signal is for representing whether or not the preassigned call number coincides with that of a stolen mobile telephone device. The control section invalidates the operation of the keyboard and the power key and stops display of the display section and then transmitting an alarm signal to the base station on reception of the information signal representing the fact that the preassigned call number coincides with that of the stolen mobile telephone device.

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