http://www.fda.gov/Radiation-EmittingProducts/RadiationEmittingPr...

http://www.fda.gov/Radiation-EmittingProducts/RadiationEmittingProductsandProcedures/HomeBusinessandEntertainment/CellPhones/default.htm

Under the law, FDA does not review the safety of radiation-emitting consumer products such as cell phones and similar wireless devices before they can be sold, as it does with new drugs or medical devices. However, FDA does have the authority to take action if cell phones are shown to emit radiofrequency energy (RF) at a level that is hazardous to the user. In such a case, FDA could require cell phone manufacturers to notify users of the health hazard and to repair, replace or recall the phones so that the hazard no longer exists.


so the short answer is the FDA doesnt care too much about electronic/comms devices, it probably leaves it up to a hospital to work out if the device can cause issues

not real hard to do for the average engineer