The U.S. cellular telephone industry will start publishing information on the amount of radiation that enters users' heads when they use various wireless phones. CNNfn has learned that the Cellular Telecommunications Industry Association is going to require manufacturers to submit data - called SARs for Specific Radiation - starting August 1. The move is a policy shift for the CTIA. Manufacturers who want to be certified by the CTIA will need to submit the information, which is expected to start reaching the public in three to six months. The information will be included in the product literature inside cell phone boxes. How to read the data is not yet clear, but customers will be able to compare SARs on different cell phones. The industry, however, continues to maintain that all cell phones sold in the United States meet government regulations and are safe. For years the CTIA has said the radiation numbers would lead to a "meaningless beauty contest" and would confuse the public. Louis Slesin, editor and publisher of Microwave News, told CNNfn that there was a lot of pressure from customer.