Do you use SMS in Korea?

Yes, Korea mainly uses WCDMA network, WCDMA mobile phone and Unicom's 3G card, and then opens international roaming. In Korea, you can make phone calls and send text messages.

If you want to ask prepaid users how to use the network when roaming to South Korea after opening the international roaming function, if the Korean KR KTF logo (WCDMA mobile phone is required) is automatically displayed on the mobile phone screen, it means that you have successfully logged into the Korean network and can use the Korean roaming service. If your mobile phone doesn't display the logo of Korea KR KTF in the network search, I suggest you go to mobile phone settings > network service > network selection > Korea KR KTF and set it manually.