Viber is a cross-platform Internet phone and instant messaging software for smartphones.

Viber users can communicate with each other for free without registration or payment, as long as both parties have the software installed. Viber supports multiple languages including Chinese.

Viber supports iPhone and Android phones (also available on iPod Touch or iPad), Viber requires your phone number to register (registration is completely free), then it will read your phone's original address book list, and if it finds that your friends in your address book have already registered for Viber, it will automatically recognize and identify them. Then you can call or text it directly through the network for free.

Viber integrates with your local address book, in fact, your address book is a list of friends, what Viber does is to tell you which people in this list you can already talk to via Viber for free (i.e. the other person also has Viber installed).

Viber is a VoIP the tool that allows smartphone users to make free voice and video calls worldwide and share free instant messages using multimedia attachments. It is one of the most popular communication applications in some parts of the world, but it has been in the shadow of Skype and WhatsApp. With more than 1 billion users, Viber is one of the major players in the im market. It uses the user's mobile number to identify you on the network and allows you to bypass your mobile carrier using VoIP free communication. Viber Out allows users to call non-Viber, landline and mobile numbers at much lower VoIP rates. The application is available for most platforms. There is no need to register a username and password or alias, instead just use your mobile number to provide unlimited free voice and video calls and SMS to other Viber users. Grouped SMS. It has a huge user base with hundreds of millions of users. It meets the needs of users who call landline and mobile numbers cheaply. Some may find the service blocked in certain regions and with certain operators, as such applications and services pose a serious threat to mobile operators.