About: http://webisa.webdatacommons.org/4307258

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I am also a regular user of Viber and Whatsapp. But Viber is not available for all types of phone (specially viber blackberry application does not have all the features which includes free calls).
http://www.w3.org/ns/prov#wasQuotedFrom	freepctophonecallsblog.com