Nowadays, there exist many ways to make international calls at great rates.
Making calls on your PC
Among the most popular VoIP software, we have Skype, which is available for free download on PC and Mac.
To make phone calls with Skype you will need microphone, which is already integrated to the vast majority of laptops.
Skype users can communicate via free voice and video calls.
Skype also allows you to call a landline or mobile numbers in any country of the world at great rates. Two payment methods are available to the customer: payment per minute or monthly subscription. Prices will vary depending on the destination.
Smartphone and tablets
Two mobile apps : WhatsApp Messenger and Viber.
WhatsApp Messenger is specialized in sending of messages, while Viber provides the ability to make phone calls. To communicate, users must have the same app installed on their smartphone (Android ,Nokia , Blackberry, Windows Phone and iPhone)
Note that: Viber and WhatsApp also allow users to share photos, videos and voice messages and even create groups.