I heard that there is an app that allows you to make free international calls on your smartphone, what kind of app is it?

I heard that there is an app where you can make free international calls with your smartphone.

What kind of app is it?

693 2016-05-06 Gentleman

I think you're talking about the OTO global international phone app.

OTO currently offers free international telephone service to 94 countries in Korea, including the United States, China, Japan, Taiwan, Hong Kong, Thailand, Australia and the United Kingdom.
It's not exactly completely free.
There must be a subscription plan, but you can use the remaining free currency in that plan.
If there is no free call time left, the domestic call fee will be charged.

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