You will receive the e-SIM as a QR code attachment with an email. You must have a data connection during the installation of the e-sim. On almost all phones with e-sim support there is a Network menu option to add an e-SIM or a Data Plan. You use this option, and choose install with a QR-Code. It may take a while until the e-sim comes online. In some cases, a restart of your phone may be necessary for the esim to work. An e-sim can only be registered on one device. If you can no longer use your device on which the e-sim was installed, then you must order a new e-sim. We transfer the balance on the old e-sim to the new e-sim. If you want to change/renew your device, you must remove the e-sim on the old device first, and reinstall it on the new one. If necessary, we can send the e-sim QR code again.