[T]he data on cellphone safety is mixed, although a few recent international studies have suggested a link with three types of brain tumors. The Food and Drug Administration also says there’s not enough information to determine conclusively whether cellphones are safe or unsafe.
CNET has some facts:
Ten highest-radiation cell phones
Ten lowest-radiation cell phones
The sidebar at the CNET cites lists all manufacturers. 1.6 is the U.S. maximum allowed.
Thanks to Bob Ormond for the links.