does holding a phone near your head all night give you cancer?

Question: does holding a phone near your head all night give you cancer?
- Keywords:
  cancer,
  phone
Asked by amyr to Enda, Jean, Tim on 22 Nov 2012.
- Jean Bourke answered on 22 Nov 2012:
  
  Luckily, no. There has been no link established between mobile phone usage and cancer rate so rest easy!
  
  I’d say the only problem would be that it might wake you often as it goes off or that you wan’t hear the alarm coz it’s muffled!
- Enda O'Connell answered on 23 Nov 2012:
  
  Hi Amyr,
  
  This is a good question and one that comes up a lot as we are all using our mobile phones more and more every day and keeping them close at night.
  
  Mobile phones emit energy as radio waves which can be absorbed by the tissue in our bodies. However, this type of energy is called “non-ionising” energy, and the only known effect on our bodies is heating. This is why your ear and face might become warm during a long phone call, but not if the phone is plugged in next to your bed. “Ionising energy”, such as X-rays and radiation therapy, are linked with increased cancer risk, but this is NOT the type of energy emitted by our phones.
  
  To cause cancer, our phones would have to damage our DNA in some way, and the type of energy they emit simply does not do that.
  
  So, if you are worried about cancer, it is perfectly safe to use phones and to keep them near you at night.

Question: does holding a phone near your head all night give you cancer?