We work with premium carriers and have servers all over the globe. This really helps with the call quality and latency if you are calling the US, Latin América or European/Asian/African countries.
We use Amazon Web Services and optimize the routes of the servers and providers according to your location. If you have good connection and a good pair of headsets call quality will not be an issue.
If you want to find more information about the structure you can check this post in our Blog😄