That does not mean that the PCBs can't hide spy/kill switch chips but then, you could say same about any electronic stuff on sale.
Far too unpredictable, finding those devices across multiple network sectors and determining what the output or effect on deployment is way to hit and miss, you would need to work out the end user application before deployment which means before sale and marketing... way back in design. Far easier and more intelligent to deploy in software that can even be adapted once it calls home.
I always suspect the cheap webcams or smart TV chips containing spy codes.
Yes they punch holes in firewalls from the inside where they have been trusted by the owner, much more intelligent setup if you so wanted to deploy. Most say that they don’t care ‘cos nothing of interest happens on ‘my camera’ but it’s not the camera that matters, it’s the code sitting inside your firewall
I’ve wiresharked cheap web cams and seen stuff happening that I couldn’t explain, it might well have been benign, but unexpected so they went in the bin..
And that’s why I don’t care who builds the hardware for 5g, the risk is the same whoever it is and the biggest risk is the user and their terminals. That’s why the operator and legislators do what they do AND despite mistrust by some, they know what they are doing.