VIDEO: New Blackberry with upgraded BBMRIM has confirmed its new mobile operating system on Blackberry 10 will have upgraded Blackberry Messenger to include free voice calls over wifi - and other tech news.
Source: VIDEO: New Blackberry with upgraded BBM (http://news.bbc.co.uk/1/hi/programmes/click_online/9769866.stm#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa)