If you are an Overseas Pakistani and have checked from PTA's website www.pta.gov.pk that there are certain ZONG sims on your name and you are not using them, please follow the instructions below to get these sims unregistered from your name.
Details for overseas Pakistani SIM Information
668 - complaint form is as below :
Visit PTA’s website www.pta.gov.pk and
obtain count of Sims against your NICOP/CNIC