Sending SMS to Korea

There are three major Mobile Carriers in South Korea : Korea Telecom, SKT and LG U+. These days, following the progress in 4G/5G… development, more and more people rely on various messengers rather than SMS. That is for personal communication.

When it comes to corporate use, SMS is still a very important tool in reaching out to the customers, be it advertisement messages or registration codes for some app or service.

When sending SMS to South Korea, there are certain specifics you should be aware of :

  1.  When sending SMS from abroad, the message length is limited to 90 bytes.그림1
  2. Messages beyond 90 bytes will be delivered in one piece, but not as commonly known concatenated SMS (concat, C-SMS). In Korea, there is a term of LMS (Long Message Service) for messages of 91~2000 bytes.
  3. One of the special headers might be added :
  • [Web발신] (“Sent from Web”), indicating that the message was sent via A2P route.
  • [국외발신] (“Sent from abroad”), indicating that the route used does not belong to a local provider
  • (광고) (“Advertisement”), indicating that message contains promotional information.

IMPORTANT! The first 2 headers are automatically added by the Mobile Carriers and are not counted in the overall byte count. Thus, if you are charged by your provider for adding these extra bytes… Well, let’s say you have a good reason to find a new one!

E-mail : sureminternational@gmail.com

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