You can block a friend on Viber. Don’t know what Viber is? Well, it is a free VOIP application that lets you send free messages as well as make free calls to other Viber users, on any device and network over 3G/4G or WiFi connections, in any country!
Viber uses your phone number as your “identity” and lets you make free Viber phone calls to any of your friends that have Viber – using THEIR phone number. If your friend have your number in his/her phonebook and installs Viber, the person will be able to call you for free if you are also using Viber.
Just because viber to viber calls is free, there are some guys who now see it as opportunity to be disturbing some friends.
If you don’t want a particular number or contact to be calling you, you can easily block the contact. This is possible if you ‘ve installed Viber 4.2 or later. You will not be able to do so if you are using an older version.
You can download Viber 4.2 App for Android from Play Store. For other mobile devices and computer, download latest Viber application here.
Once installed, you can block a contact by going to “Settings” > “Privacy” > “Block List”.
Tap the “Block Number” tab, enter the phone number and tap “block”.
How To Unblock Contact or Number on Viber
Anytime you want to unlock a number or a contact on your Viber, go to “Settings” > “Privacy” > “Block List”.
Then, tap the “unblock” button next to the contact.