By unlocking your BlackBerry, you will be able to use it on other GSM network. "The underlying activity sought to be performed by the owner of the handset is to allow the handset to do what it was manufactured to do -- lawfully connect to any carrier.
Emf protection is a whole new set of idea to us. So long we had been accustomed with pollutions which we can witness with our five senses but now the entire scenario has changed.