This was in 1988 during Rajiv Gandhi and Zial Haq days. Once when RG went to Pakistan on a state visit , ZH showed him the state of the art telephone system of Pakistan. RG even made a call to hell and spoke to his mother Indira Gandhi for about 10 minutes. The bill came to just 1 pakistani rupee.
RG was highly impressed by Pakistans telephone system and after coming back to India ordered the ministry of communications to come up with equally good system in record time so that he too can show it to ZH when he makes a return visit to India after a couple of months. Indeed when ZH came to India , RG showed him the telephone system. ZH spoke to Bhutto in hell for about 10 minutes. The bill came to 300 indian rupees.
ZH made a sarcastic remark about the cost of the call to hell being so expensive . RG was furious and wanted to know why the call to hell was so expensive. The engineers immediately came up with the reason. A call to hell from India is a long distance call,but from Pakistan its a local call only.