(Telecompaper) The US Federal Communications Commission has voted 3-2 to open up spectrum in the 2.5 GHz band for 5G use and finalised procedures for the forthcoming December auction of spectrum in the upper 37 GHz, 39 GHz and 47 GHz bands. In a statement, the FCC said much of the 2.5 GHz band spectrum (2496-2690 MHz) has been underutilised for many years, having been reserved in the 1960s for the so-called Educational Broadband Service.