Verizon, Ericsson, and Qualcomm recently announced plans to test spectrum-sharing technology in the 3.5 GHz band.
The band is used for military radar systems, but the FCC believes the band can be shared with commercial uses in some situations. This new Citizens Broadband Radio Service (CBRS) band is being considered for various licensed and unlicensed shared uses by the FCC.
Verizon wants to use the band to add download capacity to its LTE network in high-demand areas like stadiums, college campuses, or airports. The band is currently 3550-3650 MHz, although the FCC is also considering stretching it to 3700 MHz.