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Method and System for Blocking a Mobile Phone Based on Detecting Removal of a Subscriber Identification Module (SIM) Card

IP.com Disclosure Number: IPCOM000223170D
Publication Date: 2012-Nov-06
Document File: 3 page(s) / 64K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system for blocking a mobile phone based on detecting removal of a Subscriber Identification Module (SIM) card associated with the mobile phone is disclosed. The method and system includes a mechanical switch for detecting when the SIM card is removed or replaced.

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Method and System for Blocking a Mobile Phone Based on Detecting Removal of a Subscriber Identification Module (SIM) Card

Disclosed is a method and system for blocking a mobile phone based on detecting removal of a Subscriber Identification Module (SIM) card associated with the mobile phone. To determine removal of the SIM card, one or more mechanical switches are used. The one or more mechanical switches are inserted underneath a connector that closes a circuit when the SIM card is inserted into the mobile phone. Fig. 1 illustrates a top view of an exemplary embodiment of the disclosed system wherein a single mechanical switch is used.

Figure 1

Fig. 1A illustrates a top view of the SIM card, Fig. 1B illustrates a connector, Fig. 1C illustrates a connector with top removed revealing a mechanical switch and Fig. 1D illustrates a SIM card inserted into the connector. The mechanical switch is normally closed. When the SIM card is inserted into the connector, the mechanical switch is open circuit as illustrated by Fig. 2A and Fig 2B.

Figure 2

Fig. 2A shows the mechanical switch's lower contact normally closed when no SIM card is in the connector. Fig. 2B shows lower and upper contact open when the SIM card is inserted into the connector. Fig. 2C shows the upper contact closed when a shim is inserted into the connector in an attempt to remove the SIM card while defeating the closing of the lower contact.

Alternatively or additionally, the removal of the SIM card may be detected by monitoring power consumed (including standby power) by the SIM card as shown in Fig. 3 and Fig.


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