You Can Call Them
You can call any number in Pakistan, from any phone in your local area, by dialing the access number first, then the PIN number, and the Pakistan phone number.
For example, if you are in New York, you will dial access number from any phone in New York, after the announcement; enter your PIN and then the phone number in Pakistan.
It gets even better, beside the benefit of using any phone, your call can be made to US, Canada, and all other countries, Prices vary by Countries, and Cities.
For Pakistan, it will cost you 8 ¢ to 13 ¢ per minute. For USA, and Canada, it will cost you 2.9 and 2.5 cents respectively, per minute.
 

They Can Call You
Your family in Pakistan can call you to your home phone number or your Cellular number. You can give us up to 2 or 5 Pakistan phone numbers, from where they will call you. Also give us one phone number, in Canada, where you want to receive your calls.
Now they can call you only from those 2 to 5 numbers, to your phone number. They can call you whenever they want, by dialing one access number of that city, and the phone will ring in Canada.
For example, people in Peshawar can call you by dialing 7131234, but from only those numbers, provided by you. These numbers can be for example your parents home and yours in-laws home. Since you have provided us the one phone number in Canada, you will get the call from them, at that number only. This call will cost you amazingly, only 4 cents per minute from Peshawar. If it is from Karachi, the cost will be even lower, as 3 cents per minute.
The charges will be deducted from your prepaid account, in Canada, and your family in Pakistan will pay only local phone charges of that city.