Below is the list of free voice/video calling software applications for all major operating system platforms which can be used with Mobile Phones as well as desktop pc. Using these softwares services you can call the other party with no charges at all. Because these softwares use the VOIPtechnology (Voice Over Internet Protocol). Voip is a method of transmission of voice signals, multimedia signals over the internet. With voip you can make call using internet connection/wifi instead of your service provider’s network all over the world. But there are some conditions –
1. Both the parties should have an internet (For Mobile Phones preferably 3G network/WiFi connection is required).
2. Both the parties should have this software installed.
3. Call can be placed and received only if this software is running.
Most popular software and freely downloadable app on the net. This software supports all major operating systems like Windows, Apple’s iOS & Mac, Android and Symbian. Both the parties should have an account on skype to access the service. With Skype you chat using their instant messaging and you can call from skype to skype on –
1. Mobile to Mobile
2. Mobile to PC
3. PC to PC
Mobile to Landline or PC to Landline requires a premium account.
Tango application is also free calling service. It uses the same address book as that of the device, synchronizes with it and shows a tango tag against the contact if they are registered to tango hence with just a click you can place a free call to the tango user. This synchronizing feature is not available in the Skype. It works with iPhone, Android, Windows Phone, Windows PC. It can be downloaded freely from app store or android market place and registering on tango is quiet simple and easy.
Viber application also allows free calling and sending messages. It’s a lot simpler than Skype but it you can’t make video calls from it and there is no desktop client for talking to those on a computer but it does have some advantages, such as the lack of need to create an account. Viber just uses your mobile number to make the calls (although the actual call is made over the Internet) and similar to tango viber also uses your existing phonebook numbers instead of having to create and add new contacts, as on Skype. If you just want to talk to someone using an Android or an iPhone (a version for BlackBerry phones is in works), Viber is a lot easier and simpler choice.