Why is there concern that cell phones may cause cancer or other health problems?

Well, as we all know that cell phones depend on the wireless waves in transmitting signals, and as a result to the direct contact between the cell phones and the cerebral cortex via the outer ear these waves might cause a damage on the cellular level on the short run, and that damage might be enlarged by the frequent use on the long run .

Persistent exposure to even low level radiation could cause cell damage.