On December 5, 2010, Verizon Wireless launched its 4G LTE network in 38 markets covering 100 million people in the United States, supporting "loaded" network download speeds of 5-12Mbps and upload speeds of 2-5Mbps.
On January 5, 2011, AT&T announced that it would be launching its 4G LTE network in the 2nd half of 2011, with a goal of deployment being "largely complete" by the end of 2013.[19]
On January 6, 2011, Verizon Wireless announced that it plans to add more than 100 LTE markets to cover 175 million people by the end of 2011, have 2/3 of the US population covered by mid-2012, and provide nationwide coverage by the end of 2013.[20]
http://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution
照这个时间表，LTE手机应该在几个月内就会出现，Apple 就不得不迎头赶上
