https://us.community.samsung.com/t5/Galaxy-S21/Should-my-S21-Ultra-have-a-IMEI-eSIM-if-I-didn-t-put-it-on-my/m-p/2190608#M52975 Every device has an IMEI. IMEI stands for International Mobile Equipment Identity. This number is the unique number that is associated with your device for verification purposes and anti theft. It is often likened to your device's social security number so to speak. An Esim requires the usage and verification of the IMEI and they are not the same thing, but rather, are dependant on one another. Esims are also dependent on other factors. An EID is the number generally associated with your Esim. Various carriers have different methods for activation of esims.<BR /><BR />I personally use T-Mobile. Here is their link for troubleshooting an Esim here. <A href="https://www.t-mobile.com/support/devices/device-troubleshooting/samsung-on-device-activation-troubleshooting" target="_blank">https://www.t-mobile.com/support/devices/device-troubleshooting/samsung-on-device-activation-troubleshooting</A> Tue, 15 Feb 2022 17:16:59 GMT Ibuddy66 2022-02-15T17:16:59Z