I’ve got a Google FI. The best for international travel. But, I’m going to go back to Verizon for better US coverage. FI says it will do wifi calling but doesn’t work. They use Sprint, ATT towers so the coverage is very spotty. I can’t use phone in the house. It will ring and can text but calls don’t work. Driving will have bad connections and dropped calls. The pixel phone is just fine.
Watsapp works great for wifi but remember it is only cell to cell no landline.
Just get a prepay sim card when traveling if you don’t use FI network.