Electricity & Communications

Electricity and Voltage

The standard voltage in Korea is 220 volts (and 60 Hertz, or cycles), and the outlet has two round holes. If you do not have a multi-voltage travel adapter, you can borrow one from your hotel's front desk for free of charge (however, some establishment may request a minimal fee as deposit, covering for possible loss). If you would like to purchase one in Korea, you can find them at the airport, any of the retail stores, major duty-free shops, convenience stores or even stationery stores.

Public Phones

Public Phones

As the distribution of cell phones, smart phones and related mobile gears increases in Korea, public phone booths are rarely seen on streets and public facilities today. However, there are still some public phone booths at popular sites, bus stops, and subway stations. Korean public phones generally provide local and international call services alike with payment by coins or phone cards.

Telephone cards can usually be purchased at convenience stands or stores near the telephone booths, and the remaining balance cannot be exchanged for cash. Most of these cards are valid for a period up to three years; however, some may have different validity period so make sure to double check the information before making a purchase.

Public Phones

Metropolitan Cities

  • Seoul (02)
  • Incheon (032)
  • Gwangju (062)
  • Busan (051)
  • Daegu (053)
  • Daejeon (042)
  • Ulsan (052)
  • Sejong (044)


  • 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)
  • How to make an international call to Korea
    When you make a phone call to Korea from abroad, first dial 82 (country code for Korea), then the area code (except for the first number 0). Finally, dial the phone number you wish to call.
    For example: Calling Seoul (area code 02) with 777-7777 as the phone number, dial +82-2-777-7777.
  • How to make an international call from Korea
    • First, dial any of the following international call company numbers, and then the country code, area code and finally the number you are calling.
    • International Phone Call Carriers: 001, 002, 008, 00365, 00700 and more.
    • Pre-paid Phone Cards: Pre-paid phone cards are available at convenience stores, major drug store chains, bookstores and newspaper stands.

Mobile Phone Rentals and Roaming Service

As soon as visitors arrive at Korea's major airports, including Incheon, Gimpo, Gimhae and Jeju international airports, you can proceed to 'roaming center' desks and get your mobile devices connected immediately with local network service provider after a simple registration. In addition to roaming services, SIM Card purchase, Wi-Fi egg rentals and even smart phone or other mobile gears are available. More information about fees, location of roaming desks and other details are found from the websites listed below.

Kt Roaming Center

Website: roaming.kt.com (Korean, English, Japanese, Chinese)

SK TELECOM Roaming Center

Website: www.sktroaming.com (Korean, English, Japanese, Chinese)

LG U+ Roaming Center

Website: www.uplus.co.kr (Korean, English, Japanese, Chinese)

SIM Card Purchase (Korea SIM card)

Travelers can purchase SIM cards from the major retail stores, convenience stores or from the website of the respective service providers. More often than not, this service is cheaper than roaming phones, therefore preferred communication service by a large number of business travelers.

Convenience Stores (airport, downtown, nearby tourist attractions): 7-11, CU, and GS25

KT Mobile

Website: krsim.net / koreasim.kr (English, Chinese)


Website: www.egsimcard.co.kr (English, Japanese, Chinese)


Website: www.simcardkorea.com (Korean, English)


Internet service is often provided in public places such as airports, train stations, and bus terminals in Korea. PC rooms and internet cafes are also great places to go for and they are mostly 24 hours in operation. In addition, many of popular tourist sites are equipped with free Wi-Fi connections as well help international visitors to stay connected with friends and families back at home.

Postal System

Any visitor to a foreign country may naturally want to send postcards or letters, sometimes parcels to home country. A few years ago, mailboxes can be easily found on almost every other street and in buildings. Finding a mailbox today is a bit more difficult because of the Internet revolution. If you cannot find a mailbox, you can ask your hotel front desk to put your letters or postcards in the mail or you can go directly to a nearby post office. Visit Korea Post for more details on post office locations, parcel services, purchasable items (stamps, postcards and letters for souvenirs) and more.

- Korea Post: www.koreapost.go.kr (Korean, English)

This page was last updated in May 2016, and therefore information may differ from what is presented here. We advise you to check details from the official websites before visiting.

<Last updated on May 30, 2016>