Gallery: Cell phones with the highest radiation levels Summary: Every cell phone sold in the U.S. has a rating that measures the amount of RF energy that is absorbed by the body. Here are the 20 phones with the most. By Andy Smith | December 1, 2010 -- 08:30 GMT (00:30 PST) Previous | Next Image 15 of 20 Also at No. 5 is the Motorola Grasp from U.S. Cellular with a SAR level of 1.52. (review) Topics: Telcos, Hardware, Mobility Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.