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There are also some other apps allowing people to make international calls without paying any money but asking something else from them, like taking part on a survey or giving their personal data for commercial purposes. Besides, these calls are usually with some restrictions. In this sense c, for example, offers free international calls but only to 35 countries and the calls are limited to 10 minutes each (in exchange of watching a 30 second advertising video before).
Software
But what if you do not have a laptop for phoning? If so, you can still make use of VoIP by installing the software on your regular cell phone. Some options, like RebTel and Jahjah, get your calls routed over a VoIP connection so it may substantially reduce charges.
Hardware
On the other hand, you can also buy some device-based VoIP services that eliminate your monthly bills, as once you have acquired that piece of hardware you will be able to make unlimited local and long distance calls for free. It´s true that you often end up paying something per month in the form of taxes and fees, although not too much. The price of the devices range between £40 and £200, and the most prominent examples are MagicJack, Ooma and Phonegnome.
Calling for Free to the USA and Canada
The U.S.A and Canada both have an advanced development infrastructure for VoIP services, and they may probably have the cheapest rates for phone call services in the world. Because of that, most of the apps and programs named above let you call for free to any landline and mobile phone in those countries. If you have a friend or a relative living in the USA or Canada, try it this way!