The part that seemed most Korean was that the answer was not just “which carrier,” it was “which branch and which clerk on which day.” Big carriers can get cautious once the ARC is under six months, but some people still get through if they are doing a simple extension, bringing proof of employment or school status, or switching to a shorter commitment. I would go in expecting less flexibility on subsidized plans and a better chance on prepaid, 알뜰폰, or a no-frills setup.