Re: Nuremberg Code
There are know bio effects attributable to Tetra (hence why you don't put a handset in your shirt pocket or near a pacemaker), but these are to do with the way signal power is handled. It was one of the pro's and con's of adopting Tetra(UK) v. TETRAPOL (as used in many European countries).
As for mass market mobile phones, we still in the trial phase and so there is a (small) possibility that like cigarette smoking we may discover they are in fact dangerous. However, if you are using a WiFi connected device you are exposing yourself to higher levels of radio energy from the WiFi adaptor in that device and for longer than from the GSM phone...