The study's authors compared the cellphone habits of nearly 1,000 children in Western Europe, including 352 with brain tumors and 646 without. Kids who used cellphones were no more likely to develop a brain tumor than others, according to the study of children ages 7 to 19, published online Wednesday in the Journal of the National Cancer Institute.
If you want to read the whole article something which i highly recommend since we are educators using mobile technology with kids then i invite you to check Cellphones don't increase cancer risk in kids