This is one advantage with Google Fi. Their international roaming is high speed.This isn’t entirely accurate. T-Mobile and Sprint both offer free unlimited 2G data in pretty much every country in the world. In all my time spent abroad since I’ve had T-Mobile, which collectively add up to multiple months, the free 2G data has been perfectly sufficient for basic web browsing, looking up maps, getting public transportation directions, or requesting an Uber. If, for whatever reason, I need full speed LTE I can always log in to my T-Mobile account and have it in 30 seconds by paying $5 for the day, $35 for 10 days or $50 for the month. I’ve only ever found myself using that a handful of times though.
That said, I find even the $5/day, $50/month too expensive particularly for a family.
Our usual overseas travel is to the Philippines to visit relatives. With local SIMs, $50 is enough to get prepaid service for one month for 4 people. A 7-day prepaid promo with unlimited text + unlimited call to same network + 3GB data (w/rollover) + 1GB/day for videos, social media and gaming is only $2.50.
Now that I actually have a dual SIM iPhone (SE 2020), Wi-Fi Calling on the US line (probably on eSIM) + data on local SIM seems pretty ideal. We do need the local number to contact friends and family anyway.