Operators to establish SOP, DNCR and black lists to control spam: Pakistan Telephone Authority http://tribune.com.pk/story/375743/operators-to-establish-sop-dncr-and-black-lists-to-control-spam-pta/ …
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Operators to establish SOP, DNCR and black lists to control spam: Pakistan Telephone Authority http://tribune.com.pk/story/375743/operators-to-establish-sop-dncr-and-black-lists-to-control-spam-pta/ …