An operating method of a terminal device, which is configured for radio communication via different frequency bands, further being configured to control access to a plurality of identification and authentication modules (114, 116, 118) or to a multi-network identification and authentication module, in performing a network scan, the method comprising for the terminal device operating in a non-registered state: - receiving a command for starting a network scan; - in response to receiving the command, attempting a synchronization with predefined control channels on all frequency bands receivable by the terminal device or on a subset thereof comprising a plurality of the frequency bands, and, upon successful synchronization with a respective one of the control channels, ascertaining respective network-configuration information provided via the respective control channel by a respective network; - determining, using the network-configuration information ascertained, an estimate of a quantity indicative of an achievable data throughput, hereinafter throughput estimate, associated with the respective ascertained network-configuration information; - generating and providing an output, which is indicative of at least one of the determined throughput estimates for the respective network configurations. - after providing the output, waiting for an input indicative of a selection of the at least one of the output network configurations, - in response to receiving the input indicative of a selection of the at least one of the output network configurations, contacting, based on locally stored initial access and authentication information, a remote provisioning server; - requesting from the remote provisioning server an authentication and identification record allocated to the selected network configuration associated with the throughput estimate; - receiving the requested authentication and identification record from remote provisioning server and storing the received authentication and identification record locally, in particular in a local authentication and identification entity; - registering the terminal device to the selected network configuration using the determined authentication and identification record. - receiving a command for starting a network scan; - in response to receiving the command, attempting a synchronization with predefined control channels on all frequency bands receivable by the terminal device or on a subset thereof comprising a plurality of the frequency bands, and, upon successful synchronization with a respective one of the control channels, ascertaining respective network-configuration information provided via the respective control channel by a respective network; - determining, using the network-configuration information ascertained, an estimate of a quantity indicative of an achievable data throughput, hereinafter throughput estimate, associated with the respective ascertained network-configuration information; - generating and providing an output, which is indicative of at least one of the determined throughput estimates for the respective network configurations. - after providing the output, waiting for an input indicative of a selection of the at least one of the output network configurations, - in response to receiving the input indicative of a selection of the at least one of the output network configurations, contacting, based on locally stored initial access and authentication information, a remote provisioning server; - requesting from the remote provisioning server an authentication and identification record allocated to the selected network configuration associated with the throughput estimate; - receiving the requested authentication and identification record from remote provisioning server and storing the received authentication and identification record locally, in particular in a local authentication and identification entity; - registering the terminal device to the selected network configuration using the determined authentication and identification record.