Comment by AshamedCaptain

I always hear as the excuse but it is ridiculous. If the user wants to transmit on "illegal" frequencies, all he has to do is to change the country setting in their Wi-Fi router, et voilà, illegal transmissions.

The entire Android OS has about as much access to radios than your average PC, if not less. In fact, even on recent android devices, wireless modems still tend to show up to the OS as serial devices speaking AT (hayes) (even if the underlying transport isn't, or even if the baseband is in the same chip). Getting them to transmit illegal frequencies is as much easy or hard as is getting a 4G USB adapter to do it.