SIM cards, telephone cards and VoIP are some of the methods available for users to make international calls. SIM cards and telephone cards use similar technology for making calls by establishing a connection through cellular service providers. VoIP is a totally different methodology that establishes a connection between two endpoints, over the Internet Protocol. This technique has developed over the time and replaced the basic Public Switched Telephone Network (PSTN). Internet, being the medium of communication in this methodology, makes it much more reliable and efficient for users. VoIP calls can be made by using a laptop, PC or any such device that supports internet connectivity.
There are many applications like Skype, Lingo and Vyke that allows customers to make VOIP Internet Calls at cheap rates. One of the major reasons of emergence of VoIP market so rapidly is the overall reduced cost of the system. It is so because this technology allows consumers to establish data communication, voice calls and multimedia sharing sessions. VoIP calls can also be made using a network computer, with headset and a speaker, through 3G and Wi-Fi connection.
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