> putting a strong passive magnet in a phone is just asking for trouble. Not only can it interfere with medical devices, but it will also gather up iron particl

> putting a strong passive magnet in a phone is just asking for trouble. Not only can it interfere with medical devices, but it will also gather up iron particles in the environment that will scratch up the back of your phone. Not to mention the effects on the magnetic strips of credit cards, hotel keys, and other pocket-likely items one may be carrying with the phone. I'm shocked this hasn't caused more commonplace hassle if the magnet is strong enough to throw the reed switch in a pacemaker.