Travelers can purchase a SIM card to insert in their personal cell phone device to enjoy unlimited data or receive a personal number while traveling in Korea. These prepaid SIM cards usually cost less than roaming services and offer unlimited data for a period of 5, 10 or 30 days. The SIM cards can be purchased at CU and 7-Eleven convenience stores at Incheon International Airport and Korea SIM Card’s official website. Although they can also be found at certain CU and 7-Eleven branch stores in Seoul and Busan, visitors are recommended to make a purchase in advance via online or at the airport.
Prepaid eSIM can be easily purchased and received online. The digital eSIM works by installing a prepaid data plan by scanning the provided QR code. The eSIM can be purchased on their website and you will receive an eSIM plan by e-mail, all without the hassle of visiting an offline store.

※ SIM Card Retail Locations
• Convenience stores (airport, downtown, etc.): Incheon International Airport (7-Eleven, CU) and limited 7-Eleven branch stores (Myeong-dong, Dongdaemun, Jongno, & Haeundae)
• Korea SIM Card & eSIM website: www.krsim.net (English)
• eSIM Korea: Prepaid eSIM can be easily purchased and received online. The digital eSIM works by installing a prepaid data plan by scanning the provided QR code. The eSIM can be purchased on their website and you will receive an eSIM plan by e-mail, all without the hassle of visiting an offline store.
• eSIM website: esimkorea.net(English)

Source : VISIT KOREA Homepage

Korea's major airports, including Incheon, Gimpo, Gimhae and Jeju International Airports, have roaming centers, operated by local network service providers. Visitors can get their mobile devices connected for roaming here after a simple registration process. In addition to roaming services, SIM Card purchase, Wi-Fi egg rentals and even smart phone rentals are available.

Source : VISIT KOREA Homepage

※ Location in Incheon International Airport(Roaming service information) : www.airport.kr

You can easily access the Internet or Wi-Fi to instantly use in public places, public transportation and restaurants.

Location: Arrival Halls on the first floors of Terminal 1 and Terminal 2
Price : Pocket WiFi Korea offers three different types of portable WiFi router: Pocket Wifi Korea Unlimited, Pocket
※ WiFi Korea (4G LTE) Price
• daily LTE supply(2GB) : 2,900KRW/Day | 2,300KRW/Day(From 6th day)
• daily LTE supply(unlimited) : 3,900KRW/Day | 3,100KRW/Day(From 6th day)

Metropolitan City Area Code
Seoul (02), Incheon (032), Gwangju (062), Busan (051), Daegu (053), Daejeon (042), Ulsan (052)

Provincial Code
Gyeonggi-do (031), Gangwon-do (033), Chungcheongbuk-do (043), Chungcheongnam-do (041)
Jeollabuk-do (063), Jeollanam-do (061), Gyeongsangbuk-do (054), Gyeongsangnam-do (055), Jeju-do (064)