Here are some information.:) 1. You can't use your mobile in here because of different communication method. We use CDMA and WCDMA(upgraded GSM version using SIM card) so you should borrow or rent a mobile in Korea. (Roaming is way too expensive) 2. Compared with Malaysia, our public transportation is very popular. If you want, you can travel from end to end in Seoul by subway and need the traffic card like 'Touch n Go card'.(you can get that at any convenient store) 3. Prepare long-sleeved clothes, the weather is not like in Malaysia. It's almost fall in here, you feel cold a bit, especially at night. 4. Most Koreans only use the Korean language. (Don't be panic) 5.(if you are muslim) It's not easy to find a halal restaurant. Before trip, you should check out halal restaurants in Korea over the Internet. (http://www.visitkorea.or.kr/ena/CU/CU_EN_8_1_6.jsp) Selamat datang di Korea:)