Many Nepali people are going abroad in terms of different purpose. For work, study, travel, business. However, essential is communication to keep connecting with family, friends, relatives and nation.
We can not have all the time facebook or skype. So, we have to use mobile phone or landlines.
For that cheapest call is internet call. In some of the countries we get free internet calls. The most developed countries are free for calling. USA, Canada and most of the European countries are free to call or very cheap to make a call.