Most of the cards sold on our website are using best the carriers and Advanced VoiP Call Routing Capabilities. You should generally not have such problems with our cards, but to be practical, there is no 100% guarantee that your call will always go through due to the nature of the telecommunications systems in the World.
Do you guarantee that calls will be connected every time and that there will be no busy signals?
by Amar | Jan 16, 2018 |