I mean if you used an SDR in your consumer product. Let's say you make a dual purpose LoRa / WiFi radio to put in vehicles for a fleet management solution. If you use an SDR, you'd have to lock it down with DRM to prevent end users from repurposing it.
Yes, but the same applies to your WiFi router even if it has hardware filters. Its simply a certification requirement.
That doesn't have anything to do with LimeSDR. This is already not a product that is certified for anything. It exists in a very gray zone where anyone using it for transmission is likely in violation of the law unless they obtained a development/testing license in the specific band they are using.
The easiest way to leave the gray zone would be to get a ham radio license. Although this might vary from country to country, generally you are allowed to use selfbuilt transmitters in specific frequency ranges, which also includes noncertified hardware.
I'm not too sure about that. Having a HAM radio license would allow you to transmit on bands licensed for HAM usage. A lot of the stuff that people want SDRs for (especially for transmitting) lies outside of those bands.
Or put the unit in a faraday cage to carry out testing. I believe a lot of people do this to allow them to play with transmission while not breaking any laws.
