4talk is the smartest VoIP and IP messaging solution that is build up in several components.
Solution allows you to make calls over any type of network with your existing phone number.
Bringing technology on IP based networks (WiFi access points, 3G, LTE, …) and Cellular technology.
WiFi / 3G / LTE to Cellular (GSM) Convergence. With seamless handover between access networks.
4talk app is used as to test the solution and trial subscription will need to be asked with Mondial Telecom.