Many countries now assume you have a phone. For example getting UK visa requires a smartphone. I don't think going without a phone is feasible nowadays.
Another question is if going with a burner phone that has just sim card and bank card, sufficient. But then you need appleid/google account on the device, and this again links back to your phone number, and it's not easy in practice to have proper clean device.
Another question is if going with a burner phone that has just sim card and bank card, sufficient. But then you need appleid/google account on the device, and this again links back to your phone number, and it's not easy in practice to have proper clean device.