The graphene phone has the SIM card.
Now how does that phone share a VPN connection with the laptop? Or another phone that’s not graphene?
And my requirement for my scenario is, the upstream carrier cannot tell that the traffic is not coming from the graphene phone
If your objective is to punish Google, or to have nothing to do with Google. I completely agree with you using a pixel phone just doesn’t make any sense. You shouldn’t do it
If your objective is to have the most security possible… Then you should install graphene on a Pixel phone.