South Korea Naver's mobile phone verification code

It will arrive soon. I verified it in a few minutes. First, I can choose two ways. One is to send text messages directly, which will be slower. The other is the sign of a small phone, which will call you back directly and tell you the verification code with a voice prompt. You must know the pronunciation of 1, 2, 3 in Korean. I chose a small mobile phone, and the text message is too slow.