i heard alot of people saying that

No, the don't cause cancer. But they might CONTRIBUTE to cancer if you use them for a long time and very frequently.

there are no ABOSOLUTES to this theory. It is plausible, but has never been proven.

I heard that too, however studies found that the radiation in cell phones are very little and cause no such thing.electronics.howstuffworks.com/cell-phone-radiation.htm

one bunch of experts says yes, another bunch says nono wonder we are confused

I never heard of it. I am deaf, so I use only text message. Hope it will not cause brain cancer to people who use it. I don't think so, but I don't know nothing about it.