Hello - Korean

오랜만이에요

Long time no see

무슨 일이야?

What's up?

뭐하니?

Whatcha' doing? - casual

모해?

Whats up - casual

여보세요

hello (on the phone)

좋은 아침입니다

Good morning

좋은 아침

Good morning - casual

안녕하세요

Hello (formal)

안녕하세요. 만나서 반갑습니다.

Hello, it's nice to meet you. - Formal

야!

Hey! - casual

안녕

Hi. Casual. Can be used at anytime of the day.

안녕하세요?

Hi; Hello; How are you?

잘지네냐

How are you doing - casual

잘 지내세요?

How are you? - formal

어떻게 지내세요?

How are you? - informal

어떻게 지내셨어요?

How have you been? - casual