A free program for Android, by DemandVoIP Inc..
We have developed a unique service for you, which will allow you to make international calls at a very low cost. Our service offers you a great rate for your calls, as well as an easy and convenient way to make the calls.
What is Callbacker?
It is a free service for making phone calls. You don't have to check your mobile account balance all the time. You can make calls either on a business trip or vacation. You can use the Callbacker service any time, and, if needed, you can deposit your account instantly.
You don't have to worry about your Internet connection or a steady link with a 3G or Wi-Fi network.
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