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To combat this practice, some cell phone service providers have required the use of PINs, personal identification numbers, by their subscribers. ...
www.wipo.int/pctdb/en/wo.jsp?IA=US1996012072&DISPLAY=DESC - 22k -

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Posted by waqasahmad

Personal identification number (PIN) checking to combat cloning be following method:

Subscriber is required to (a) establish PIN and (b) periodically enter PIN before being
authorized to make calls

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Posted by jahangir1983

Personal identification number (PIN) checking to combat cloning be following method:

Subscriber is required to (a) establish PIN and (b) periodically enter PIN before being
authorized to make calls

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Posted by jahangir1983

Personal identification number (PIN) checking to combat cloning be following method:

Subscriber is required to (a) establish PIN and (b) periodically enter PIN before being
authorized to make calls

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Posted by jahangir1983

By periodically enter PIN before being
authorized.

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Posted by waqqas1

Personal identification number (PIN) checking to combat cloning be following method:

Subscriber is required to (a) establish PIN and (b) periodically enter PIN before being
authorized to make calls

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Posted by sagitraz