Japanese IT News Site PC Watch Tells That, Research vice president of China Unicom , Huan Wenliang, told iPhone five Will Support W-CDMA based high-speed Data Transfer standard HSPA Evolution HSPA + (21Mbps) at Keynote speech in Macworld Asia 2011.
http://9to5mac.com/2011/09/29/china-unicom-confirms-iphone-5-with-21-mbps-hspa-support/