A mobile communication device including a Radio Frequency (RF) device and a controller is provided. The controller activates a predetermine Application (APP), and provides a Packet-Switched (PS) data service for the predetermined APP using a first subscriber identity via the RF device. Also, the controller establishes a Radio Resource Control (RRC) connection using a second subscriber identity via the RF device to enable the mobile communication device to enter an RRC connected mode after the predetermined APP is activated, and keeps the mobile communication device in the RRC connected mode associated with the second subscriber identity while providing the PS data service for the predetermined APP using the first subscriber identity.

A method for obtaining a command relating to a network access profile of an eUICC security module incorporated into a communication device and associated with a physical identifier. The communication terminal: obtains the physical identifier and an anonymous identifier of the security module is calculated from the physical identifier and a random parameter; transmits a request to obtain the command, via an “operator server”, to a “preparation server”, the request to obtain including the anonymous identifier of the security module; obtains the random parameter and calculates the anonymous identifier from the physical identifier of the security module and the random parameter; and sends, to a “discovery server”, a request to obtain information intended to obtain the command, this request to obtain information including the anonymous identifier, in order to obtain, in response, from the discovery server, an address of the preparation server.

An electronic device includes a communication module, an embedded-subscriber identification module (eSIM) in which at least one profile is stored, and a processor. The processor is configured to, when accessing a server and succeeding in authentication for a first profile among at least one profile stored in the eSIM, receive an authentication token indicating successful authentication for the first profile from the server, when establishing communication with a first electronic device through the communication module, inform the first electronic device that the first profile is transmittable data, and when transmission of the first profile is requested from the first electronic device, transmit, to the first electronic device, the authentication token for downloading a second profile corresponding to the first profile from the server.

A method of selecting, by a control entity, a network slice is provided. The method includes receiving a create session request message from a Serving Gateway (S-GW) in response to a Packet Data Network (PDN) connectivity request message transmitted by a terminal, transmitting, to a storage entity, a request message for subscriber information including identification information of the terminal, receiving, from the storage entity, subscription data of the terminal corresponding to the identification information of the terminal, selecting at least one network slice based on the subscription data of the terminal and slice information supportable by the control entity, and transmitting a create session response message including information of the selected at least one network slice, wherein the subscription data of the terminal includes information about a subscribed network slice of the terminal and information regarding whether the subscribed network slice of the terminal is supported in an Evolved Packet Core (EPC).

A method of selecting, by a control entity, a network slice is provided. The method includes receiving a create session request message from a Serving Gateway (S-GW) in response to a Packet Data Network (PDN) connectivity request message transmitted by a terminal, transmitting, to a storage entity, a request message for subscriber information including identification information of the terminal, receiving, from the storage entity, subscription data of the terminal corresponding to the identification information of the terminal, selecting at least one network slice based on the subscription data of the terminal and slice information supportable by the control entity, and transmitting a create session response message including information of the selected at least one network slice, wherein the subscription data of the terminal includes information about a subscribed network slice of the terminal and information regarding whether the subscribed network slice of the terminal is supported in an Evolved Packet Core (EPC).

A method is performed at a server that manages embedded subscriber identity module (eSIM) profiles. The method includes, when a user equipment that belongs to a global enterprise network relocates from a first locale to a second locale in which a first private network and a second private network of the global enterprise network are located, wherein the user equipment includes a locale-specific first eSIM profile that includes a first non-public network identifier of the first private network, receiving, from the user equipment over a network in the second locale, information that indicates the user equipment is in the second locale. The method further includes identifying the second private network based on the information, and generating a locale-specific second eSIM profile that includes a second non-public network identifier for the second private network. The method includes configuring the user equipment with the locale-specific second eSIM profile.

A communication device for handling mobility from a long-term evolution (LTE) network to a fifth generation (5G) network comprises a storage device storing instructions of transmitting a first LTE Non-Access Stratum (NAS) message to the LTE network; receiving a second LTE NAS message in response to the first LTE NAS message, from the LTE network; and transmitting a message to the 5G network, after determining to communicate with the 5G network instead of the LTE network, wherein the message comprises a slice information, and the slice information is comprised in the first LTE NAS message or in the second LTE NAS message.

A communication device for handling mobility from a long-term evolution (LTE) network to a fifth generation (5G) network comprises a storage device storing instructions of transmitting a first LTE Non-Access Stratum (NAS) message to the LTE network; receiving a second LTE NAS message in response to the first LTE NAS message, from the LTE network; and transmitting a message to the 5G network, after determining to communicate with the 5G network instead of the LTE network, wherein the message comprises a slice information, and the slice information is comprised in the first LTE NAS message or in the second LTE NAS message.

Disclosed is method and an evolved NodeB (eNB) for use in a Long Term Evolution (LTE) network including establishing an X2 interface between the eNB and another eNB and communicating information between the eNB and the another eNB via the X2 interface.

Disclosed is method and an evolved NodeB (eNB) for use in a Long Term Evolution (LTE) network including establishing an X2 interface between the eNB and another eNB and communicating information between the eNB and the another eNB via the X2 interface.