Mobile data problem
Telecommunications service counter. A foreign worker shows a staff member a mobile data connection problem on their smartphone.
한국어 제목: 휴대전화 데이터 문제

Korean dialogue
A: 휴대전화 데이터가 안 돼요.
My mobile data isn't working.
B: 언제부터 안 됐어요?
Since when has it not been working?
A: 오늘 아침부터 안 됐어요.
It hasn't been working since this morning.
B: 휴대전화를 한번 껐다 켜 보셨나요?
Have you tried turning your phone off and on again?
A: 네, 그래도 안 돼요.
Yes, but it still doesn't work.
B: 유심과 네트워크 설정을 확인해 드릴게요.
I will check your USIM and network settings.