IVoIP means voice communication through Internet. This type of communication is a lot cheaper than analogue or mobile communication. For example, you can call all Russian mobile numbers for 1.08 rouble per minute free of VAT. Unlike mobile communication, it has no roaming rates. You do not need any wired equipment or office exchanges. All the equipment stays with the provider; subscribers just use it remotely from their personal smartphones or laptops. But the main advantage of VoIP is its price. Internet communication is, on average, by 90% cheaper than analogue, mobile or satellite communication.