Facebook boss Mark Zuckerberg has stonewalled calls for his company and Google to be regulated in the same way as mobile networks . Mobile chiefs said on Monday that the online companies should have to obey the same sort of strict rules as mobile phone businesses , because they are also used for communications , for example via Facebook´s messaging apps . However , Mr Zuckerberg refused to engage with the discussion other than to say that the issue was 'nuanced ' . Scroll down for video . Founder of Facebook Mark Zuckerberg , who has refused to engage in discussion on whether Facebook and Google should be regulated in the same way as mobile phone networks . Instead , he used a 20-minute interview at a conference in Barcelona to insist again and again that he was 'not a regulator ' . ' I do n't really have much to say on that because I 'm not a regulator…I 'm not an operator and I 'm not a regulator so I do n't know what the regulatory framework should be exactly , ' he said . When pushed on the point , he added : ' I don ’ t know . I ’ m still not a regulator . ' Earlier that day , Tim Hoettges , the boss of Deutsche Telekom , which owns half of EE , told a conference in Barcelona that regulators need to clamp down on so-called 'over the top ' companies - digital businesses like Facebook and Google which provide communications services on mobile and internet networks . 'There is a convergence between over-the-top web companies and classic telcos [ telecommunications companies ] . We need one level regulatory environment for us all , ' he said . His call comes amid mounting concerns that internet businesses like Twitter , Facebook and Google can be used as a platform to publish pornography or hijacked by terrorist groups to radicalise new recruits . Many digital businesses have been slow to crack down on inflammatory material on their platforms , although they have vowed to get tougher in recent weeks . Google has started hiring Arabic speakers to help fight jihadi propaganda videos published on YouTube , its online video site . Speaking at the Mobile World Congress in Barcelona , Mr Zuckerberg insisted again and again that he was 'not a regulator ' Facebook has said it will start doing more to tackle extremist propaganda . However , it has taken some of these companies years to take action , whilst others have failed to do anything . Earlier this month , it emerged that Twitter had snubbed a meeting with a government minister called to discuss ways to tackle the proliferation of pornography on certain websites . Around 500,000 explicit photographs and videos are published on social network every day , despite the fact that it is targeted at children as young as 13 . Delegates at mobile world congress were disappointed with Mr Zuckerberg´s failure to engage with the regulation issue on Monday . People had spent up to two hours queueing to get a seat in the auditorium here the Facebook founder and chief executive was speaking . However , many left his session half way through as it became clear that he would not discuss the issue .
Mark Zuckerberg refused to discuss calls for Facebook to be regulated . Facebook chief insisted he was 'not a regulator ' at a conference in Barcelona . Mobile networks have said online firms should have to obey rules like them . They argue social networks are also used for communication purposes . There are mounting concerns internet businesses are being used as a platform for porn and terrorism .