So, what exactly is eSIM (embedded SIM)? eSIM refers to a SIM in which the chip in a conventional USIM card is installed inside a smartphone. In a word, it can be defined as a ‘digital SIM card.’ Currently, most mobile phones that support eSIM are released as Dual SIMs that can use USIM + eSIM at the same time. In addition, there are models that support multiple ‘eSIM profiles’ in one terminal, so