This works now, but good luck in 10 years time when the radio chip requires a digital signature from the host OS signed by google or apple and your current phone is deprecated by 6g or whatever.
I remember, when DVD players were required to show mandatory, non-skippable sections of video, chinese players violated the standards and international agreements and allowed skipping those sections, and they also sometimes illegally ignored regional restrictions.
I think times were different back then. Modern times are more like China selling Playstation 5’s with mod shops: to my knowledge, they currently don’t. Even if it ever becomes a thing the PS6 is only a few years away and will be even harder to break.
I mean, the actual implementation will be that CCP signs Google DragonFly Global Root CA cert, and Apple runs Google signed firmware, but those are just minor implementation details.
Mobile hotspot with a wireguard tunnel wrapping all traffic. Different RF bands (e.g. Starlink). Unauthorized private autonomous mesh networks. I don't care how hard they make it. I am never going to stop uncompromisingly exercising my right to absolute control over hardware I bought and paid for.