The latest research does seem to confirm that using mobile phones does not increase the user’s risk of brain tumours, or, indeed, any other form of cancer. The largest study, undertaken in Denmark and covering some 420,000 subjects found no link between the use of mobile phones and the later development of brain cancers, leukaemia, or any other form of cancer. Other studies have not found that brain cancer is any more common among mobile phone users. There were some studies where some people with brain cancer had the tumour on the side of their head where they said they held their phone to, though there were problems in the research which asked them report their behaviour many years ago.
Cancer research UK also point out that though the use of mobile phones has greatly increased since the 1980s the incidence of brain cancer has not changed very much – and this fact is also true for all then other countries that have undertaken such studies. Cancer Research UK does add the rider, though, that as brain cancers take a long time to develop any increase may not yet be noticed. One of the reasons for believing that mobile phones do not cause cancer is that they do not have anything in their technical specification that is likely to cause cancer. They transmit and receive microwave radiation which is very weak and does not have enough energy to damage human DNA and so that could not be a factor.
Altogether it appears that the use of mobile phones is unlikely to cause cancer, though studies need to be followed up over time. People who are concerned can always use hands-free sets, though this is not necessary according to the experts.