WhatsApp is another very popular cross-platform messenger working not only with Windows Phone, but also with devices with OS Android, Symbian, S40, Bada, BlackBerry and iOS. The application has a huge audience that has long ago exceeded the number of three hundred million active users, and despite the small drawbacks, every day it attracts more and more users worldwide. The only thing that you need to run the application, is the Internet; moreover, for the basic functions the slowest GPRS-connection is enough, and for the additional features you need to use 3G/Wi-Fi Internet, and it is desirable to have an unlimited tariff.

Basic functions

The basic functions mean a common chat like the one that the ICQ service provides. Also with the help of this application you can share multimedia files (images, audio and video clips) with your friends. There is no voice and video communication such as in Viber, and it is not expected to emerge, but it still has a definite advantage. In order to start using this application, you just enter your phone number in the first box and confirm it in the next one with a code that will come in the response message (SMS).

Adding contacts principle

As soon as the registration is complete, you will find yourself in the main menu with your favorite contacts, and you can bet that this list will not be empty. That's because the program works with your contacts as well as with contacts of other people, and when you identify your phone number during the registration, the server is synchronizing the numbers of those users who have your number in their smartphones. At the same time, the server checks for registered phone numbers that are available in your address book. Thus, it appears that at the time of registration your friends find your contact in their favourites in the WhatsApp application, and you find theirs in your favourites.