Replacement for the Fuze?

Another issue with smartphones is the concern about radiation. When I carry my cellphone with me(not that often), I try to keep it as far as possible from my vital organs to protect from radiation. While smartphones do have an airline mode to turn off the wifi and cellular, I would still be concerned that the setting might somehow be changed, or that there still might be quite a bit or radiation emitted even in the airline mode. I typically keep an mp3 player in my shirt pocket, however I would be reluctant to do this with a phone. So price and size aren’t the only reasons why I wouldn’t want to use a phone for playing music. Others who carry a cellphone all the time might not want to use it for music, as they would fear running down the battery playing music, and possibly missing important phone calls.