How about this European research, the Danes followed 420,000 people for up to 21 years. This was almost since cell phones were introduced there in 1981, so it included many people using the the old high-wattage analog phones. The result:
“We found no evidence for an association between tumor risk and cellular telephone use among either short-term or long-term users. Moreover, the narrow confidence intervals provide evidence that any large association of risk of cancer and cellular telephone use can be excluded.”
http://jnci.oxfordjournals.org/content/98/23/1707.abstract
Here is what NIH has to say based on WHO recommendation of cautionary approach.
Again, it's a free country. Let people make their own decisons.
Let me put it this way. G. Gordon Liddy described in an interview how an ordinary pencil can be used as a deadly weapon. It does not mean that sale of pencils should be banned. But it also alerts you to know what could happen next (danger) if someone is holding pencil the way Liddy described it, regardless what he says (marketing)
Should you carry Iphone/BB in the front pocket of your jeans? You be the judge. It's your asset management.