http://www.siemensjobcam.com/global-mobile-phones/

what would be the pros and cons if we unified all of the mobile systems in a global sense?
If we go to mainland china using a 3G mobile phone from Hong Kong can we still make phone calls?
Wait…which question do you want answered? the 1st one or 2nd one?
Bangladesh Election 2008: Naeem Mohaiemen on Minorities, Global Competition, Mobile Phones