Method for transferring an assignment regarding an embedded universal integrated circuit entity within an electronic device from a first mobile network operator to a second mobile network operator, wherein the embedded universal integrated circuit entity is integrated in the electronic device, wherein the electronic device comprises a microprocessor, wherein the method comprises the following steps: -- in a first step, the embedded universal integrated circuit entity is initialized, together with the electronic device, to be used with the first mobile network operator and a corresponding mobile communication network by using - by the electronic device and the embedded universal integrated circuit entity - an access number for communication contacts with the first mobile network operator and the mobile communication network, wherein first subscription related information and/or first logging related information, related to the embedded universal integrated circuit entity and/or to the electronic device, is stored, by the first mobile network operator, in a specific repository accessible to the first mobile network operator, wherein the first subscription related information and/or the first logging related information relates to the use of the embedded universal integrated circuit entity and/or the electronic device with the first mobile network operator, -- in a second step, subsequent to the first step, the assignment regarding the embedded universal integrated circuit entity is transferred from the first mobile network operator to the second mobile network operator, wherein - when conducting the transfer of the assignment - the first subscription related information and/or the first logging related information of the specific repository is accessed by the second mobile network operator, wherein the specific repository realizes the functionality of an enhanced home location register or enhanced home subscriber server such that additional data is retrievable from the specific repository, the additional data relating to the lifecycle of the electronic device and/or of the embedded universal integrated circuit entity, the additional data comprising: -- data or information related to contracts, -- data or information related to the status, -- data or information related to external databases, -- data or information related to the history of the usage of the electronic device and/or the associated embedded universal integrated circuit entity. -- in a first step, the embedded universal integrated circuit entity is initialized, together with the electronic device, to be used with the first mobile network operator and a corresponding mobile communication network by using - by the electronic device and the embedded universal integrated circuit entity - an access number for communication contacts with the first mobile network operator and the mobile communication network, wherein first subscription related information and/or first logging related information, related to the embedded universal integrated circuit entity and/or to the electronic device, is stored, by the first mobile network operator, in a specific repository accessible to the first mobile network operator, wherein the first subscription related information and/or the first logging related information relates to the use of the embedded universal integrated circuit entity and/or the electronic device with the first mobile network operator, -- in a second step, subsequent to the first step, the assignment regarding the embedded universal integrated circuit entity is transferred from the first mobile network operator to the second mobile network operator, wherein - when conducting the transfer of the assignment - the first subscription related information and/or the first logging related information of the specific repository is accessed by the second mobile network operator, wherein the specific repository realizes the functionality of an enhanced home location register or enhanced home subscriber server such that additional data is retrievable from the specific repository, the additional data relating to the lifecycle of the electronic device and/or of the embedded universal integrated circuit entity, the additional data comprising: -- data or information related to contracts, -- data or information related to the status, -- data or information related to external databases, -- data or information related to the history of the usage of the electronic device and/or the associated embedded universal integrated circuit entity. -- data or information related to contracts, -- data or information related to the status, -- data or information related to external databases, -- data or information related to the history of the usage of the electronic device and/or the associated embedded universal integrated circuit entity.