Orange, O2, T-Mobile, Vodafone, Virgin and 3 have ed up to a Code of Practice, which imposes an "18" classification on adult content.
E-commerce Minister Stephen Timms said it was a much-needed "excellent example of responsible self-regulation". It covers images, video, gambling, roooms, chatrooms and net access but not premium rate voice and SMS services.
Age assurance Mobile operators have been working on a framework to control and censor the distribution of mobile content over the last 12 o2 chat rooms. An independent body will decide on standards for the classification system and will work in a similar way fhat other parts of japanese chats media industry.
Children's charities welcomed the step, but said they hoped those operating similar services p2 fixed-line net would do the same. Wap worry With newer 2. Chatroom access through mobiles have been a particular concern, as they are popular with many children and teenagers.
The code will ban those under 18 from mobile chatrooms which are not moderated, in an attempt to protect children from online grooming. Mobile chatrooms - or Wap chatrooms - are similar to net chatrooms, but involve groups of people sending messages o2 chat rooms all those in the same room can read on their phone screens.
Mr Carr said children's charities would be closely monitoring how the guidelines worked in practice and reviewing its effectiveness.