In the United States, in 2020, the Citizens Broadband Radio Service (CBRS) spectrum from 3.55-3.7 GHz was opened up for B2B use as a private spectrum for enterprises, separate from the MNOs' public 4G/5G network licensed spectrum for B2C use (in this frequency band, PAL spectrum requires a license and is paid for, while GAA spectrum, like Wi-Fi, does not require a license and is free)....