With the amount of modern applications available, the latest models can publish the users position, their online shopping habits, their friends and interests to providers.

mobile phone providers are not allowed to give data to third parties without user permission. Many people give their profiles to marketing companies who don't read the terms and conditions it is claimed. Human rights activists warn that this data can have an unprecedented effect on business life.

Last week Facebook, Bebo, Myspace and other social networking sites were under close scrutiny by the government in an effort to control cyber crime and terror campaigns.

Simon Davies, of the human rights group Privacy International, said customers were giving up their personal information via mobile phones when signing for new apps without reading the privacy policy. Another potential pitfall, is when people download new mobile phone applications without checking the terms and conditions.

90% of users are fascinated by the latest mobile phones and don't recognise the implications of signing away rights that are normally under the law on the protection of personal data.

New mobile phones are equipped with GPS to pinpoint the exact position of the owner. Users are allowed to browse the Internet, e-mail, networking sites and trade sites. Combining data from all these different applications allows mobile phone companies to know where each user is working, 24 hours a day.

Mr Davies told the Daily Mail newspaper: "unless regulators get to grip with this customers are all doomed".