[effie]

Well they do not read directly each other's memory, but still the baseband processor is electrically connected and so can exfiltrate data from or manipulate the application processor. On the other hand, if you have two phones glued together, one for voice/sms, one for internet access via independent network without microphone, the first one cannot exfiltrate/manipulate the second one and the second one cannot record your voice. That is isolation.

[tinus_hn]

No, because there is a connection between both of these devices and all other devices on the phone network and the internet. It’s just bullshit and on top of that overcomplicated nonsense no one is going to use.

[effie]

I'm talking about physically isolated computers connected to separate networks, not connected to the same untrusted network. The meaning of the isolation is that while operator of each network has one class of data (voice/sms vs. the internet), neither has both of them.