Message supposedly endorsed by the "Apollo medical team", claims that mobile (cell) phone users should always use the left ear for calls because using the right ear will directly affect the brain. A later version, which circulates as a graphic, omits the medical team reference but maintains that using the right ear for mobile phone calls makes our brains more prone to mobile radiation.

While there are genuine concerns about possible health risks related to mobile phone use, there is no evidence to suggest that using the left ear will in any way decrease such risks.