... if people who talk on cell phones get brain cancer, so what exactly is the point of this study?

This is like the plethora of powerline studies done in the last century on the same classes of diseases (cancers). sigh...

You would think with our far better understanding of the mechanics of cancers biologically that this sort of thing would stop being such a big "scare". 

Cellphones do not emit any sort of ionizing radiation whatsoever. As in none. The waves emitted from a cell (or a cordless phone, or a wifi antenna, a bluetooth dongle, or insert-name-of-any-other-radio-frequency-device-you-can-think-of) are just too fat to lead to the sort of molecular damage necessary. The waves are too big. 

Having said that, mobile phones may not cause brain cancer, but text messaging does make you stupid.

Scott

Exactly how many studies will have to show no-risk from mobile phones before we can be "completely sure about their long-term effects," Dr Lesley Walker ?