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Suppose a person goes from his homeland to some other country. He has a phone number registered in his homeland. Now, someone from his homeland (or any country except his destination) wants to call him over the phone. What ISD code should be used - the one of the person's homeland, or that of the person's destination?
As an example, say I travel to the USA. I have a mobile number that is registered in my homeland (India). Now, someone from my country wants to call me. Should that person prefix "+91" (ISD code for India) or "+1" to call me?
As an example, say I travel to the USA. I have a mobile number that is registered in my homeland (India). Now, someone from my country wants to call me. Should that person prefix "+91" (ISD code for India) or "+1" to call me?