Apple is manufacturing and selling telecommunications devices. That being the case, the FCC's purview extends well beyond simply clearing the devices for interference. That's the standard a device is held to if it may emit EM radiation, but that emission is not meant for communications purposes, AIUI. The bar is set rather higher, and the FCC's powers rather deeper, if the EM spectrum the devices emit on is actually meant to be used for communicative purposes -- particularly if it uses a licensed band.
Disclaimer: IANAFCCW (I am not an FCC wonk.)