Is it possible auto-switch the simcard in Duos model?

Hello,

I'm planning to use Galaxy S7 Duos. I'm travelling a lot and would like to know, is it possible to have kind of auto-switch option based on country, roaming, etc? For example, when I'm in Country A - mobile automatically switches to Sim 1, when I reached country B - switches to Sim 2.

Thank you!

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