It's not just the licensed bands but also SAR. Commercial devices with BT are often close to the body. For those devices to be certified they have to operate wi

It's not just the licensed bands but also SAR. Commercial devices with BT are often close to the body. For those devices to be certified they have to operate within specific power levels, and this has to not be operable/changeable. If you can change power levels, you can bust the SAR limits. It's one thing for geeks to do what they want with SDRs. It's another to get the certification to ship a real product.