According to Japanese site PC Watch, in a keynote speech at Macworld ASIA 2011, China Unicom's vice president of research, Huan Wenliang, told the crowd that Apple's iPhone 5 will support high-speed data transfer HSPA+ 21Mbps technology. The statement was backed by a slide showing the evolution of the iPhone. The year 2011 can clearly be seen under the absent image of the iPhone 5, underscoring rumors that the iPhone 5 will, indeed, be announced at next week's (October 4) Apple press event.
Apple's current GSM (AT&T) iPhone 4 supports 7.2 Mbps HSDPA technology which already gives AT&T's iPhone 4 customers faster data speed than is currently available to Verizon's CDMA iPhone 4 customers. AT&T has already installed HSPA+ equipment in some markets so iPhone 5 customers in those areas can expect to see improved data speed versus the iPhone 4.
The HSPA+ technology is sometimes referred to as "4G" but the faster LTE 4G technology is not expected to hit the iPhone until sometime in 2012.