There have been studies indicating heavy cellphone use to brain tumors and salivary gland cancer.
You can make your cell phone use safer, at least use these suggestions until conclusive studies have been done about cell phone use and cancer.
Hold your phone several inches away from your face and use the speakerphone or headset.
It has been suggested that sleep can be less than healthy if cell phone is used before bedtime. If you need to make calls in the evening, use your land line.
CDC stated 16% of households use cellphones exclusively. This is not good for young children under 8 since it has been noted they absorb twice as much radiation as adults. Might be worthwhile to keep a land line if your kids need to make phone calls from home.
There has been some thought that men who carry their cell phones in a belt holster have 30% fewer sperm cells, making it more difficult for couples to have a baby.
And the most scary research I've found is that drivers using cell phones are 4 times more likely to crash, even if they are using hands free phones. The Insurance Institute for Highway Safety claims motorists distracted by cell phones are as dangerous as drunk drivers. They suggest, if you must use your phone, pull over
Remember the saying, "The life you save could be your own."