By using WhatsApp you can send free messages to your friends from any city or country. Messages are sent instantly and securely encrypted (none of unauthorized persons can not read them, including software developers).
Features of the messenger
Registration and signing in by your phone number. You don't need to enter your login and password.
Correspondence with one or more people. You can send audio, video, documents of different formats, emoticons and pictures. In addition, you can forward the message to other users.
Automatic synchronization with the server. Contacts and messages will be available both on the PC and on the phone.
View detailed contact information.
Adding users to the blacklist. They won't be able to call you and send messages.