Mobile phones do not raise the risk of brain tumours.
A major new study has allayed concerns surrounding the safety of the wireless technology - as mobile phones emit radiofrequency waves that can penetrate several centimetres into the brain when held near the head.
The findings, which have been published in the Journal of the National Cancer Institute, have revealed that there is no significant difference in the risk of developing a brain tumour between those who had never used a phone and those who had.
The experts collected data on phone use and subsequent reports of tumours on 776,000 women in Britain.
Kirstin Pirie, from Oxford Population Health's Cancer Epidemiology Unit, said: "These results support the accumulating evidence that mobile phone use under usual conditions does not increase brain tumour risk."