The Chinese Telecom giant China Unicom has revealed in Macworld Asia 2011. That the next generation iPhone, the iPhone 5 will have HSPA+ , so that it will support upto 21 Mbps.
Japanese 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.
Other Service providers like Verizon and AT&T are ready to provide 4G LTE service.
We have to wait and see, what Apple released on Oct 4 2011 and then come to a conclusion.