Tried both solutions: I travel to Europe frequently. For a while I had a local phone with it’s own SIM card and number, but not a smooth operation due to phone books, favorites, etc.
The last 4-5 years I used a local SIM card for my regular unlocked Verizon iPhone 6, then 7.
Typically I spend $75 for 500 minutes with some data included but also try to use WiFi when available.
Only drawback is that the SIM card will expire if not used for a while.
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