While there are a number of different phone technologies in use in South Korea, you can find several that offer a standard GSM or LTE connection and allow you to bring your own phone.
Buying a SIM card in South Korea
There are no known restrictions on overseas visitors buying a SIM card while travelling to South Korea.
We're not sure whether any providers for South Korea offer prepaid mobile phone services for overseas visitors. Leave a comment below to let us know your experiences!