FCC devices are certified / allowed to use a spectrum, but you must maintain compliance. If you're a mobile phone manufacturer you have to be certain that if a bug occurs, the devices don't start becoming wifi jammers or anything like that.
This means you need to be able to push firmware updates over the air (OTA). These must be signed to avoid just anyone to push out such an OTA.
The government has a history of compelling companies to push out signed updates.
There are hobbyist groups that tinker with these things. They are just as lazy as me and do not publish much. One has to find and participate in their semi-private .onion forums. Not my cup of tea. Most of it goes over my head and requires special hardware I am not interested in tinkering with.
47 CFR Part 2 and Part 15
FCC devices are certified / allowed to use a spectrum, but you must maintain compliance. If you're a mobile phone manufacturer you have to be certain that if a bug occurs, the devices don't start becoming wifi jammers or anything like that.
This means you need to be able to push firmware updates over the air (OTA). These must be signed to avoid just anyone to push out such an OTA.
The government has a history of compelling companies to push out signed updates.
There are hobbyist groups that tinker with these things. They are just as lazy as me and do not publish much. One has to find and participate in their semi-private .onion forums. Not my cup of tea. Most of it goes over my head and requires special hardware I am not interested in tinkering with.