Do you experience that most foreign calls coming into Nigeria since last month do change to Nigerian numbers. My friends abroad call me recently and i thought it a number from Nigeria but when i recieved the call the voice will state that it a friend abroad. I wonder if they are back they will say no but the they use in calling me is a Nigeria number and not a foriegn no.

Yes. It happens. They are not lying

Its very simple. A simple voip application will do the trick. I call Nigeria via a voip app and the possibility to change my calling number depends on if I have previously verified it through the app verification system.

For example, I have a mobile number in all the countries I lived and as usual, I verified each of the number through the app. Using this method, I can be able to change my calling number by selecting it from the list of verified phone numbers. I did that when I was in Nigeria as well and I could be anywhere in the world and be able to call with a Nigerian number.