Irancell identifies mobile phone intruders via postal code

The operator tends to receive its subscribers 10 digits postal code via sms and if the code is not adjusted with sim cards document then subscribers link will be cut off forever.  
Prank calls recently have increased in Iran by prepaid sim cards with once they have hit the mobile phone market.
In this way all prepaid sim cards subscribers should register their ownership and have their postal code which cited in their documents. 
Irancell hopes that by offering this solution the prank call problem will end.
The operator has more than 12 million subscribers out of which more than 95 percent are prepaid ones.
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