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More and more people are ditching carrier roaming in favor of travel eSIMs
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
eSim means you don’t have to go to a store to get a physical SIM. You can use a ‘SIM store’ app to get an eSIM for wherever you are.
Another minor advantage is that you don’t need a SIM PIN as the SIM is a physical part of the phone. So you only need to enter one code when you restart your phone.