Wifi? Because it is part 15. That spectrum is less strict.
SDRs? Because they are not certified transmitters. They are test RF gear, or a component of a transmitter, not an end-user product.
Cellular radios in a PC? You don't get root on those. Same situation as they are in a cell phone: They are licensed-band transmitters, and they are required to be tamper proof to protect the licensee.
SDRs? Because they are not certified transmitters. They are test RF gear, or a component of a transmitter, not an end-user product.
Cellular radios in a PC? You don't get root on those. Same situation as they are in a cell phone: They are licensed-band transmitters, and they are required to be tamper proof to protect the licensee.