While there are
Purportedly inks to "radiation" from cell phones and brain tumors, if there was a link, one would expect and astronomical increase in brain tumors from 1990 to 2010.
There is no change. So if there is a link, it is weak and causation is quite inefficient and low. One has to balance the risk (low) with benefit, and that depends on the child, their age, and maturity.