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That is a special voice application working on voice over IP and designated for Android OS. You may install this app to your smartphone and use it for making cheap outgoing calls or receiving free VoIP calls to your mobile. You do not need any other hard equipment.
Most people are interested in qualitative available telephone communication without using SIM-cards, roaming and other technical appliances. Alternative way of communication means utilization of virtual phone numbers from Freezvon Company.
