Do I understand that a Google Pixel 2 smartphone has both an embedded eSIM to connect to the Project Fi system and a vacant nanoSIM slot if you wish to purchase a nanoSIM and connect via a different network. The appeal...use the phone via a regular carrier, but when traveling internationally, switch to project Fi (unlimited SMS, $10/G data and $.20/minute phone calls). Correct? Good data speeds internationally while connected via project Fi?
You may be correct about the use of the SIM slots - but I guess I don't understand the appeal of switching to Project FI just for international travel. I would think it would be the opposite: buy a SIM when traveling internationally - or just stay on Project FI the whole time. Buying a SIM for international travel is super easy with an unlocked phone these days, anyway. 20 cents/minute is too expensive for me personally for phone calls; Google Hangouts is cheaper for international calls and free for calls to the US.
The networks used by Project Fi in my region are not nearly as extensive as the carrier I use. As for cheap phone calls while traveling internationally, I’d use Skype.