Is there a reason why Kakao Bank sends a text message when it is authenticated?

Kakao Bank sends me a text message when I authenticate.

I've never seen a case where if I sign up for a member at another place before, I'll get a text message and let you enter it, but send a text message.

Is there a reason why Kakao Bank does this?

677 2017-08-02 Gentleman

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A. 1

I think it's like that when I use an iPhone.
I receive text messages on my Android phone and type them in.
Maybe it's because iOS has restricted it.

Gentleman 7 years ago 0

A. 2

@1 Aha... That's why.
Thank you.

Gentleman 7 years ago 0

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