The links below give information from the State of California on dangers of using cellphones as well as suggestions on how to use cellphones more safely.

• The image itself is a link to the guidelines and the detail of the problem and what can be done from the California Department of Public Health.
• This link is the announcement of the issuing of the guidelines by the state government, Guidelines.
• The final link is the announcement of these guidelines by the Environmental Working Group" (EWG). Also, there is on this page a link to their suggested guidelines on cellphone use. From EWG.