150 MHz shared coming available in U.S., 3GPP Band 42 in many other countries. Most of the U.S. spectrum around 3.5 GHz was reserved for government use, mostly Navy radar. It's unused in most of the country, and now is becoming available for consumer services. The Broadband Plan in 2010 set a goal of making available 500 MHz of spectrum. Now a 3.5 GHz eco-system is developing in the U.S., driven by the demands of AT&T and Comcast. CableLabs, Ericsson, Google, Intel, Nokia, Qualcomm and a dozen others have formed the CBRS Alliance, pr below. Their goal is to "Drive technology developments necessary to fulfill the mission, including multi-operator LTE capabilities" and to "Establish an effective product certification program for LTE equipment in the US 3.5 GHz band ensuring multi-vendor interoperability." Ruckus Wireless has some of the most ambitious plans, releasing OpenG, which combines the management built into their Wi-Fi products with 3.5 GHz for a heckuva fast gateway.
In other parts of the world, the spectrum will be used for ordinary TD-LTE service.
David Wright of Ruckus tells me the three main Japanese carriers have already released phones supporting 3.5 band 42. Major chipmakers are supporting 42 and the adjacent band 43; Broadcom/Avago is ready with analog components. Among those ready to go are the remaining WiMAX providers; TD-LTE includes so much of the work Arogyaswami Paulraj did to develop WiMAX that some consider it a variant.
In the U.S., the quiet heroes included John Leibowitz at the FCC, Larry Strickling of NTIA and several who worked on the PCAST report and prefer to remain out of the limelight. PCAST - and the cogency of the argument - is convincing people around the world that sharing spectrum is the way to go.
Verizon and AT&T are using 40 MHz for LTE and looking forward to their share of the 150 MHz at 3.5.