Samsung GT-S5360L, User Manual

2000. Between them, the studies investigated any possible association 
between the use of wireless phones and primary brain cancer, glioma, 
meningioma, or acoustic neuroma, tumors of the brain or salivary gland, 
leukemia, or other cancers. None of the studies demonstrated the 
existence of any harmful health effects from wireless phones RF 
exposures. However, none of the studies can answer questions about 
long-term exposures, since the average period of phone use in these 

studies was around three years. 
What research is needed to decide whether RF exposure from 
wireless phones poses a health risk? 
A combination of laboratory studies and epidemiological studies of people 
actually using wireless phones would provide some of the data that are 
needed. Lifetime animal exposure studies could be completed in a few 
years. However, very large numbers of animals would be needed to 
provide reliable proof of a cancer promoting effect if one exists. 
Epidemiological studies can provide data that is directly applicable to 
human populations, but ten or more years' follow-up may be needed to 
provide answers about some health effects, such as cancer. This is 
because the interval between the time of exposure to a cancer-causing 
agent and the time tumors develop - if they do - may be many, many 
years. The interpretation of epidemiological studies is hampered by 
difficulties in measuring actual RF exposure during day-to-day use of 
wireless phones. Many factors affect this measurement, such as the angle 

at which the phone is held, or which model of phone is used. 
What is FDA doing to find out more about the possible health 
effects of wireless phone RF? 
FDA is working with the U.S. National Toxicology Program and with 
groups of investigators around the world to ensure that high priority 
animal studies are conducted to address important questions about the 

effects of exposure to radio frequency energy (RF). 
FDA has been a leading participant in the World Health Organization 
international Electromagnetic Fields (EMF) Project since its inception in 
1996. An influential result of this work has been the development of a 
detailed agenda of research needs that has driven the establishment of 
new research programs around the world. The Project has also helped 

develop a series of public information documents on EMF issues. 
FDA and Cellular Telecommunications & Internet Association (CTIA) have 
a formal Cooperative Research and Development Agreement (CRADA) to 
do research on wireless phone safety. FDA provides the scientific 
oversight, obtaining input from experts in government, industry, and 
academic organizations. CTIA-funded research is conducted through 
contracts to independent investigators. The initial research will include 
both laboratory studies and studies of wireless phone users. The CRADA 
will also include a broad assessment of additional research needs in the 

context of the latest research developments around the world.