Microsoft are set to release their own sim cards, which is odd seeing as how they've done all they can not to push cellular surfaces. No price and date yet. But uk, USA and France will be first countries
http://www.winbeta.org/news/microso...lular-data-plans-through-a-microsoft-sim-card
http://www.winbeta.org/news/microso...lular-data-plans-through-a-microsoft-sim-card
