Provided are a method and apparatus. A method, performed by a primary terminal, of providing a communication service may include: identifying and accessing, by performing a discovery process, an Internet of Things (IoT) terminal operating as an access point, transmitting, to the IoT terminal, authentication information for performing a second embedded Subscriber Identity Module (eSIM) setup process following a first eSIM setup process while performing the first eSIM setup process on the IoT terminal, disconnecting first connection with the IoT terminal after terminating the first eSIM setup process, performing second connection with the IoT terminal based on the authentication information, in response to an access request from the IoT terminal and performing the second eSIM setup process as a subsequent procedure to the first eSIM setup process.