Pros and Cons
- It has tighter integration with the phone, including a full view of your phone’s call log from within the app.
- No need to register with usernames and passwords
- Unlimited free voice calls and text messages to the Viber users.
- Group text messages
- Big user base, with a couple hundred million users.
- Cheap calling to landline and mobile numbers.
- Popularity decreasing
- Relatively poorer quality than other applications
- It does not offer secure and private communication.