LONDON, United Kingdom -- BlackBerry maker Research In Motion (TSX:RIM) has been summoned to a meeting with the United Kingdom's telecommunications regulator amid concern that children are able to view pornography on its smartphones.

The London Telegraph reports that the problem appears to be unique to the BlackBerry, which has become increasingly popular among young users in recent years.

Research in Motion (RIM), the company behind the BlackBerry, will be joined at the meeting with the regulator by representatives of Britain's leading mobile networks.

"It was brought to our attention that there was a problem," a spokesman for the regulator told the newspaper.

"It is to do with the way in which the BlackBerry operating system works. We are very concerned and want to get this resolved as quickly as possible."

While mobile phone operators have been able to apply filters to other handsets such as Apple's iPhone, they have been unable to do so on the BlackBerry.

This is because data flows through the BlackBerry’s own services rather than those provided by the networks. RIM reportedly offered its filtering system to U.K. networks, but the offer has only been taken up by T-Mobile.

Once seen as a tool for business executives, the BlackBerry has become the phone of choice for many teenagers. A large number of its eight million users in Britain are now believed to be under age 18.

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