A mobile communication device, comprising: a wireless transceiver, configured to perform wireless transmission and reception using a Radio Access Technology, RAT; a storage device, configured to store program code of a management program; and a controller, configured to load and execute the management program in an application framework layer to perform management of network slicing configuration, wherein the management of network slicing configuration comprises: inquiring of the wireless transceiver about first network slicing configuration that is currently applied in the wireless transceiver; in response to an application being activated, determining whether the first network slicing configuration meets one or more requirement parameters of the application; in response to the first network slicing configuration meeting the requirement parameters of the application, sending a first configuration success message to the application without requesting the wireless transceiver to reconfigure the first network slicing configuration; and in response to the first network slicing configuration not meeting the requirement parameters of the application, requesting the wireless transceiver to reconfigure the first network slicing configuration to meet the requirement parameters of the application; wherein the mobile communication device is characterized in that the management of network slicing configuration further comprises: in response to the wireless transceiver failing to reconfigure the first network slicing configuration, downgrading the requirement parameters of the application and requesting the wireless transceiver to reconfigure the first network slicing configuration to meet the downgraded requirement parameters of the application. a wireless transceiver, configured to perform wireless transmission and reception using a Radio Access Technology, RAT; a storage device, configured to store program code of a management program; and a controller, configured to load and execute the management program in an application framework layer to perform management of network slicing configuration, wherein the management of network slicing configuration comprises: inquiring of the wireless transceiver about first network slicing configuration that is currently applied in the wireless transceiver; in response to an application being activated, determining whether the first network slicing configuration meets one or more requirement parameters of the application; in response to the first network slicing configuration meeting the requirement parameters of the application, sending a first configuration success message to the application without requesting the wireless transceiver to reconfigure the first network slicing configuration; and in response to the first network slicing configuration not meeting the requirement parameters of the application, requesting the wireless transceiver to reconfigure the first network slicing configuration to meet the requirement parameters of the application; inquiring of the wireless transceiver about first network slicing configuration that is currently applied in the wireless transceiver; in response to an application being activated, determining whether the first network slicing configuration meets one or more requirement parameters of the application; in response to the first network slicing configuration meeting the requirement parameters of the application, sending a first configuration success message to the application without requesting the wireless transceiver to reconfigure the first network slicing configuration; and in response to the first network slicing configuration not meeting the requirement parameters of the application, requesting the wireless transceiver to reconfigure the first network slicing configuration to meet the requirement parameters of the application; wherein the mobile communication device is characterized in that the management of network slicing configuration further comprises: in response to the wireless transceiver failing to reconfigure the first network slicing configuration, downgrading the requirement parameters of the application and requesting the wireless transceiver to reconfigure the first network slicing configuration to meet the downgraded requirement parameters of the application.