Mobile phone users have been advised to use a landline whenever possible after researchers claimed that mobiles can damage DNA.
In a four-year study, German researchers exposed human tissue to low-power microwaves, which are emitted by mobile phones, and found that the radiation caused damage to the DNA within the cells, which were kept in a suspension. They also discovered that this effect is increased in areas with a poor signal because the phone uses higher-powered radiation to maintain a connection.