My child is going on an exchange student program to Taiwan, and while
I'm giving her a phone with a prepaid SIM card, most of the students
won't be able to buy prepaid SIM cards because their sale is very
restricted now.

I checked the international roaming rates in Taiwan, and was rather
shocked to find that Verizon is actually the lowest cost wireless
service in terms of roaming there.

Verizon is $1.29/minute.
T-Mobile is $1.49/minute.
AT&T is $1.99 per minute.
Sprint is $1.99/minute.

When I was in Taiwan last month, I also found that I could actually get
service on CDMA much more readily than GSM, because the GSM
infrastructure cannot handle the volumes of calls in a country as
densely populated as Taiwan (2nd most densely populated country in the
world, but really the most densely populated when you eliminate the
uninhabitable mountainous interior.