Sipnetic — The program provides a convenient opening to use IP telephony for SIP protocol. It should be remembered that the project does not provide VoIP service. There must be a connection with the user's provider. But all functions and to call any person, to maintain an excellent opportunity for the rest of everything, save the video quality and messaging. 3G / 4G and Wi-Fi, the use of quality improvement tools, functions and applications for a variety of plug-in support for settings, and more will get the lowest cost and makes all good choices.