A Cellphone without Borders

This sounds intriguing:
Early next month, a small company called Cubic Telecom will release what it’s calling the first global mobile phone.

(..)
But here’s the other dizzying news: Cubic’s cheap global dialing has nothing to do with the phone. The real magic is in the SIM card, the memory card that determines your account information.

So get this: For $40, you can buy this card without the phone. Cubic says that you can slip it into any GSM phone — even your regular T-Mobile or AT&T phone, as long as it’s an “unlocked” phone (one that works with other companies’ SIM cards). Then your own cellphone behaves exactly like the Cubic phone described up to this point, minus the Wi-Fi calling, of course.
(..)
f nothing else, this ingenious melding of the cellphone and the Internet should strike fear into the hearts of the giant corporations that are currently bleeding travelers dry. This is how the last great overpriced pre-Internet racket will end: not with a bang, but with a SIM card.