A recent study published in the "Journal of the National Cancer Institute" indicates that there is no link between cellphone use and brain cancer. Schüz, et al., followed over 400,000 people who began using cellphones between 1982 and 1995 and found no increased risk of tumors.
Sources: Journal of the National Cancer Institute, doi:10.1093/jnci/djj464
link
Cellular Telephone Use and Cancer Risk: Update of a Nationwide Danish Cohort -- Schüz et al. 98 (23): 1707 -- JNCI Journal of the National Cancer Institute
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aftab ahmad