In this article you can find the steps that allows you to Unblock anyone that is blocked on Viber. watch the video or Just follow this steps:
1-Open Viber. Navigate to your phone’s home screen and locate the Viber application. The icon shows a white telephone on a purple background. Tap on this icon to launch the Viber app.
2-Open the app’s menu. Do this by tap on the Menu button located on the lower right hand corner of the screen.
4-Open the privacy settings. This is done by tap on “Privacy” on the Settings screen.
5-Tap on “Block List”.
6-Tap on UnBlock to Delete a number from the Block List. Simply locate the number you’re looking for and tap the “Unblock” button alongside the number to remove it from the list