Originally Posted by Viber Team
For assistance with your contact list sync issues, you can read this article:
no wonder the article wasn't helpful. I'm talking about a whole mechanism absent in this device (but surely exists for samsung at least). Which is viber syncing.
Again: on this device, the ability of pull and release is totally absent. In addition, I can add a google account, Facebook account, even a dropbox account, but I can't add a viber account... so syncing is totally absent ON MEMO PAD HD7
Your article explains how to use this feature right, but the problem is that you don't support it on this device