Great App with excellent features – Textone Second Phone Number Review

I have just installed the app...it was really nice. I loved it. But I am just worried about the international calling feature with MY CREDITS... I have researched in internet but didn’t find any information...could you please elaborate on how it works for country to country? How many credits should we have to make a call? Thanks in Advance!
Review by Habika Harry on Textone Second Phone Number.