Because the travel itinerary was decided at the last minute, I only brought my spare old mobile phone with me when I departed. After arriving at Gimhae Airport, I could not use the eSIM smoothly. I asked the local SK Telecom service counter at the airport. The service staff was very patient in assisting. Finally, they also thoughtfully helped to replace the physical card. The network problem during the trip was solved. I am very grateful to SK Telecom for its service. I am also grateful to kkday for its good platform, which allows people to buy good travel products with confidence and enjoy fast and good service quality.