Abstract: A device is configured to communicate on a wireless communication network. The device includes an embedded Universal Integrated Circuit Card (eUICC). The eUICC includes an eUICC identifier having a plurality of characters which form a unique identification code for identifying the eUICC. The eUICC identifier includes a first field having a first subset of the plurality of characters, a second field having a second subset of the plurality of characters and a third field having a third subset of the plurality of characters. The first, second and third subsets each have one or more of the plurality of characters. The first field includes an issuer identifier for identifying an issuer of the eUICC. The second field includes an account identifier for identifying an account associated with the eUICC. The third field includes a device identifier for identifying the device.