A method implemented by an enterprise server to facilitate activation of a virtual subscriber identity module, SIM, service on a mobile communication device, the method comprising: detecting a triggering event, the triggering event being: insertion of a different universal integrated circuit card, UICC, into the mobile communication device (102, 410), the detecting insertion comprising: receiving, from the mobile communication device, periodic updates including an identifier of an UICC currently inserted into the mobile communication device; and determining, based on received periodic updates, whether a change of UICC has occurred; or when a new virtual SIM platform, VSP, account including a pool of virtual SIMs is made available to the enterprise server; and in response to detecting the triggering event: determining that a SIM application on a physical universal integrated circuit card, UICC, currently inserted into the mobile communication device is associated with a mobile network operator, MNO, that has provided one or more virtual SIMs to which the enterprise server has access; determining whether the SIM application on the physical UICC is associated with one of the virtual SIMs provided by the MNO, wherein the one or more virtual SIMs provided by the MNO are included in a VSP account associated with the MNO; and if the SIM application on the physical UICC is associated with a virtual SIM provided by the MNO, sending a message to the mobile communication device indicating that the mobile communication device is additionally enabled for a virtual SIM service. detecting a triggering event, the triggering event being: insertion of a different universal integrated circuit card, UICC, into the mobile communication device (102, 410), the detecting insertion comprising: receiving, from the mobile communication device, periodic updates including an identifier of an UICC currently inserted into the mobile communication device; and determining, based on received periodic updates, whether a change of UICC has occurred; or when a new virtual SIM platform, VSP, account including a pool of virtual SIMs is made available to the enterprise server; and insertion of a different universal integrated circuit card, UICC, into the mobile communication device (102, 410), the detecting insertion comprising: receiving, from the mobile communication device, periodic updates including an identifier of an UICC currently inserted into the mobile communication device; and determining, based on received periodic updates, whether a change of UICC has occurred; or receiving, from the mobile communication device, periodic updates including an identifier of an UICC currently inserted into the mobile communication device; and determining, based on received periodic updates, whether a change of UICC has occurred; when a new virtual SIM platform, VSP, account including a pool of virtual SIMs is made available to the enterprise server; in response to detecting the triggering event: determining that a SIM application on a physical universal integrated circuit card, UICC, currently inserted into the mobile communication device is associated with a mobile network operator, MNO, that has provided one or more virtual SIMs to which the enterprise server has access; determining whether the SIM application on the physical UICC is associated with one of the virtual SIMs provided by the MNO, wherein the one or more virtual SIMs provided by the MNO are included in a VSP account associated with the MNO; and if the SIM application on the physical UICC is associated with a virtual SIM provided by the MNO, sending a message to the mobile communication device indicating that the mobile communication device is additionally enabled for a virtual SIM service. determining that a SIM application on a physical universal integrated circuit card, UICC, currently inserted into the mobile communication device is associated with a mobile network operator, MNO, that has provided one or more virtual SIMs to which the enterprise server has access; determining whether the SIM application on the physical UICC is associated with one of the virtual SIMs provided by the MNO, wherein the one or more virtual SIMs provided by the MNO are included in a VSP account associated with the MNO; and if the SIM application on the physical UICC is associated with a virtual SIM provided by the MNO, sending a message to the mobile communication device indicating that the mobile communication device is additionally enabled for a virtual SIM service.