GrapheneOS Thank you for posting this here. I was about to jump to Beta but have now decided it might be better for me to wait.
Pocketstar I use a mobile router and connect it through WiFi (WiFi+airplane mode)
Here's a thread from the official GrapheneOS account covering that use case: https://grapheneos.social/@GrapheneOS/113319956422621755
Pocketstar I don't trust the baseband.
As relatable as it might seem, I don't think that's sensible. Both baseband and Tensor CPU are (as of now) manufactured by the same party - Samsung. If they were to do something sketchy, such as implementing a purposeful security issue, why wouldn't they do so in the CPU instead?
I believe this was also covered by GOS devs a while ago. Unfortunately I can't provide a link for this part.