Provided according to various embodiments are an electronic device in which a profile is installed and an operating method for the electronic device. The electronic device may comprise: a communication module for receiving a profile package from a profile server; an eUICC for installing a profile by using the profile package, the eUICC including a memory; and a processor, wherein the processor is configured to: perform control such that the eUICC installs the profile thereon by using the profile package and a one-time key generated by mutual authentication between the profile server and the electronic device; when installation of the profile is unsuccessful, check the cause of the unsuccessful installation of the profile; when it is determined that the unsuccessful installation of the profile is due to insufficient available space in the memory, perform control such that the eUICC cleans the memory while keeping the one-time key stored in the memory; and perform control such that the eUICC reinstalls the profile thereon by using the profile package. Various other embodiments are also possible.