Hack of a common cellphone can block communications in a cell area

08/26/2013 | MIT Technology Review online

Modifying software on a common cellphone's baseband processor can turn that phone into a device that blocks calls and text messages to other phones in a given area, according to researchers at the Technical University of Berlin. The "firmware" works to respond faster than other phones in the area to paging from a cell tower, identifying itself as the proper recipient of call or text. This in turn stalls communications in the area.

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