Viber doesnt think so!
Eset put up a image of the Viber installations source code showing details of silent downloads and statistics.
Further the installer source code put up by ESET states a certain HTTPDownloadInSilent push request.
Eset seems to be on wrong side regarding sending app statistics silently.
All tech companies do that, even browsers do that with cookies which are similar silent statistics.
Which side are you on?
source: www.techworm.net