Sonetel

Make international, high quality business calls at the cost of local calls.
The person you call sees your regular mobile phone number - or if you so
prefer - an international phone number that you buy from Sonetel.

How does the app work?
The app sets up a regular mobile call in your country, and another local
call in the destination country. The two calls are then automatically
bridged together via Sonetel's global network. This ensures excellent call
quality.
There are two call modes:
With “Call thru” your mobile automatically calls a local access number in
your country.
With “Call back” Sonetel will instead call to your mobile.