The report comes from the Environmental Health Trust, which is a non-profit group of doctors and researchers.
The group says the reason for the discrepancy is because the process to determine radiation exposure from cell phones involves the use of a mannequin that approximates a 6'2", 220-pound person.
The authors of the study say because that model only represents about 3 percent of the population, the test can not accurately predict radiation exposure. The group is pushing for a new testing system.
"The standard for cell phones has been developed based on old science and old models and old assumptions about how we use cell phones," said Devra Lee Davis, EHT.
The government had no comment on the report.
Independent scientists have said there are no conclusive studies that indicate cell phone radiation causes cancer.
Giulia Shelton, 8, says she does not use a cell phone, not even to play games.
"No, because it is very dangerous for your head," said Giulia. "When it is on it is going to hurt your head."
"Until you get more studies we will just play it safe. There is no reason they should have to use a cell phone," said Tim Easton, Shelton's stepfather.
"The doses of radiation that one would get from a cell phone are so low that double is not a significant risk to a patient," said said Dr. James Cameron, director of pediatric radiology at Rush University. "Most of these studies seem to relate to the risk of brain cancer which would be holding the cell phone right up to the head."