A local news channel of Pakistan has reported that some hijackers are using various ways to hijack the international incoming and outgoing calls. By doing this they make a profit of billions of rupees while the government faces loss of these billions of rupees. These hijackers without paying any tax or money just are hijacking calls through illegal SIM cards. They have established a network through which it is very simple to hijack any call.
In the report it was also mentioned that people who are making international calls pay the full amount of the call. But that money instead of reaching to the government or Pakistan Telecommunication Authority (PTA) goes to those hijackers.
Due to this illegal call trafficking the legal call centers, government and PTA faces a loss of about billions of rupees each year. This loss of money results in a further downfall of the poor economy of the country which is almost dead.
The process goes in such a way that when someone makes or receives an international call on his mobile phone the call is hijacked in between. Due to this hijacking of the call you may see the number on your mobile phone screen as a private number or a local number.