The above is exactly why I don't play the SIM-swap game. When I travel internationally, I just roam. I will use Skype from my smartphone for outbound voice calls, which are almost free if I'm in WiFi range, and a fraction of the cost of a roaming voice call if I need to use it over data roaming. And, I'll often be in a hotel with included Internet, so my data needs are not great. I might spend an average of $15/day on int'l data and voice roaming. It's just not worth enough to work through all of the above issues each time I change a country, and have less connectivity as a result. It's really simple: I just turn on my phone when the plane lands and it works. There's nothing to figure out or buy.