A cell phone that is instandby modeis still emitting radiation. When it is off, this ceases. Do not carry the cell phone next to your body; instead, keep it in a bag. This is especially important if you have become used to wearing it in a pocket next to your groin; research has shown that men wearing cell phones next to their groin have up to a 30 percent reduction in sperm count.Keep it away from all vital organs (heart, liver, etc.).