Originally Posted by DH
If you need an mobile phone, rent it at the airport; the rates were 3,000 KRW/day + 300 KRW/min (incoming calls are fee). The hotel charges 1,000 KRW/day + useage.
Actually if you are staying at the Chosun you get a mobile phone in your room and there is no daily charge (at least if you get an Executive Room, which I would recommend).
J